HP_H12-891_May_2023-v1.0.pdf

HCIE-Datacom V1.0 (H12-891)
Exam Name: HCIE-Datacom V1.0
Exam Code: H12-891
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QUESTION 1
What are the following advanced features supported by BGP EVPN?
A. ARP broadcast suppression
B. VRRP overVXLAN
C. Multi-active gateway
D. WI-AN Qos
Correct Answer: ABCD
QUESTION 2
Is the following correct statement for the VXLAN message?
A. The outer destination IP address is the IP address of the VTEP at the far end of the VXLAN tunnel
B. The source UDP port number is 4789
C. The destination UDP port number is 4789
D. VNI has 24 T bits to distinguish the VIAN segment
Correct Answer: ACD
QUESTION 3
To achieve an on-machine migration in the BGP EVPN distributed gateway scenario, which of the following messages is required?
A. Type5
B. Type4
C. Typel
D. Type2
E. Type3
Correct Answer: D
QUESTION 4
The means of the LAND attack is that the attacker sends an SVN packet message with the same source and destination addresses to the target host,
the source port and the destination port are the same, and the receiver waits for the final ACK packet to be sent , the connection is always in a semi-
connected state, resulting in a full limited TCP reception Waste of resources
A. True

B. False
Correct Answer: A
QUESTION 5
The following statement about the Security Alliance SA in IPSec is wrong with ?
A. SA is uniquely identified by a triple that includes the Security Parameter Inder ,Security Parameter Inder), the source IP address, and the Security
Protocol Number (ASESP) used
B. Use the display ipsec command to view information such as the encryption method used with another IPSEC peer, the traffic of interest, and so on.
C. IPSec only supports encrypting data using the pair encryption algorithm.
D. IpSec peers must be at a two-way SA to establish an IPSec VPN connection to close
Correct Answer: A
QUESTION 6
If there are multiple recipients in a multicast group, the administrator enables the IGMP-Snooping function on the switch connecting the recipient, and
when the receiver receives the universal group query packet of the queryer from the switch, how should multiple recipients respond?
A. The first recipient whose response time time expires sends the Report message, the other receivers do not.
B. All recipients will respond to Report messages only if ICMPV2 is running.
C. All recipients will respond to the Report message only if IGMPvl is running.
D. All recipients will respond to the Report message
Correct Answer: D
QUESTION 7
If you run PIM-SM in a multicast network, you need to build a multicast forwarding tree between the multicast source and the receiver to enable the
receiver to receive the multicast effect, so what are the following options for the correct tree sketch for the build?
A. What is built between the multicast source and the RP is the SPT tree
B. RP and the receiver is built between the RPT tree
C. Built between the RPT tree
D. RP and the swap is the SPT tree
Correct Answer: AB
QUESTION 8
Is the following description of the BSR/RP mechanism correct?

A. PIM-SM domain can have more than one C-BSR, but only one BSR can be elected by the C-BSR that receives the C-RP Packets are collected C-
one RP information
B. BSR advertises BSR and C-RP information to all routers in the PIM-SM domain by flooding Bootstrap packets
C. A C-BSR can also collect C-RP information by receiving C-RP packets
Correct Answer: ABC
QUESTION 9
What is the following description of LDP reliability?
A. LGP GR (Graceful Restart) takes advantage of the high difference between the LS forwarding plane and the control plane to realize that the device
forwards without interruption when the protocol is restarted or the master-standby is reversed
B. Manually configured LDP FRR policy defaults to a 32-bit backup route that triggers LDP to establish a backup ISP
C. The LDP ERR can also generate an ISP for a tag map from a non-optimal next hop, and create a forwarding table entry as a backup of the primary
LSP
D. LDP and LGP linkage, the need for IGP to suppress the release of routes, to ensure that LDP and LGP paths are consistent
Correct Answer: B
QUESTION 10
RD is used to distinguish the same IP address in different VPNs, how many bits does RD contain ? (Single choice)
A. 64
B. 32
C. 16
D. 128
Correct Answer: A
QUESTION 11
Regarding the mpLS handling mode of TTL, is the following description correct?
A. Pipe mode. When an IP message passes through the MPLS network, the IPTTL minus 1 is mapped to the WLSTTL field at the incoming node.
B. The TTL in the B. MPLS label has the same meaning as the TTL field in the head. TTL prevents mpLS networks from developing bad routing.
C. Unifore style, when an IP packet passes through the MPLS network, the IPTTL of the incoming node is minus l. The MPLS TTL field is a fixed value.
D. In MPLSVPI, if you need to hide the structure of the MPLS backbone network, you can use Uniform mode on Ingress for private network messages .
Correct Answer: B

QUESTION 12
In an MPLS VPN network, different CE devices exchange routing information with the same PE device using different routing protocols, and different
CE devices use routing protocols that are independent of each other
A. True
B. False
Correct Answer: A
QUESTION 13
Which of the following options uses an alternate channel to enable communication between IPV6 addresses?
A. DualStack
B. 6to4
C. ISATAP
D. NAT64
Correct Answer: BC
QUESTION 14
If a router only needs to forward iPv6 packets, you do not need to configure any IPV4 agreements and addresses on that router.
A. True
B. False
Correct Answer: A
QUESTION 15
BGP4+ is running between two routers, and the neighbor relationship is normal, but the BGP routing table of the router on this side does not have a
neighbor route entry.
A. The route entry in the peer BGP route table is non-optimal.
B. The next hop address of the
C. BGP route entry is unreachable
D. Peer ignore is configured on the peer
E. The peer is configured with active-route-advertise
Correct Answer: ABD
QUESTION 16

Which of the following options can affect the establishment of IBGP neighbors?
A. iBGP-Multi-hop is not configured
B. Authentication is unsuccessful
C. IGP routing is not passable
D. BGP protocol version inconsistencies
Correct Answer: BCD
QUESTION 17
Which of the following tools cannot be referenced directly by the If-match clause in Route-policy?
A. Regular expression
B. IP-prefix
C. AS-path-filter
D. Community-filt
Correct Answer: A
QUESTION 18
What information does this contain in a basic layer packet? (Multiple choice) A Data link layer header
A. Upper-level data
B. The network layer header
C. path records
D. Network Layer Tail
Correct Answer: BC
QUESTION 19
The correct description of configuring BGP4+ is that
A. BGP4+ does not support route reflectors.
B. The next hop of a B. BGP4 route can use the Link-Local address.
C. BGP4 configures the reflector, the role positioning of the reflector and the client needs to be consistent with the configuration of BGP4
D. BGP4 specifies p
E. BGP4+? Router-ID ? BGP4 ? Router-ID--??
Correct Answer: BE

QUESTION 20
A company network runs the OSPF protocol, a project in order to understand the OSPF mechanism in the network to perform packet transfer
operations, the following description of ospf messages is correct?
A. The interface sends a Hello packet immediately after joining the OSPF region
B. LS update packet is sent only when the adjacency relationship is established
C. When an LsUpdate packet is received, the router must send an LsAck acknowledgment
D. LS update packet synchronizes the link state database by sending detailed LSA information
Correct Answer: AD
QUESTION 21
Regarding the Stub region in the OSPF protocol , the following statement is correct.
A. ASBR cannot exist in the Stub zone
B. Virtual connections cannot traverse the Stub region.
C. Injecting typeT LSA
D. backbone areas that are not allowed in Stub regions cannot be configured as Stub regions.
QUESTION 22
The LSA of type certainly does not exist in the 220SPF Stub zone
A. Type7
B. Type5
C. Type4
D. Type3
Correct Answer: ABC
QUESTION 23
There is an existing router running OSPF connected to Zone 0 and Zone 1 You configured Zone 1 as a stub zone, what classes does LSA that only
operates inside Zone 1 include?
A. 7 ? LSA
B. 1 ? LSA ? 2 ? LSA
C. I LSA,2 LSA 5 LSA

D. 3 ? LSA ? 4 ? LSA
E. 1 LSA,2 LSA 3 LSA
Correct Answer: E
QUESTION 24
An engineer performed the ingestion operation on an OSPF router in a network of the company, is the following statement about the introduction of the
routing LSA correct?
A. The A. Advertising Router report is set to as the Router ID of ASBR
B. Net Mask is set to all 0
C. Link State lD is set as the destination network segment address
D. Using the Link State ID and Advertising Router, you can uniquely identify an LSA
Correct Answer: AC
QUESTION 25
In broadcast networks, elections to DIS begin only after a neighbor relationship has been established
A. True
B. False
Correct Answer: A
QUESTION 26
Which of the following statement about isis protocol route aggregation is correct?
A. Route aggregation can be configured and takes effect on all types of routers
B. Route aggregation can only take effect if configured on Leve-1 port routers
C. Route aggregation can only be configured on Leve-2 routers to take effect
D. Route aggregation can only be configured on Leve-1-2 routers to take effect with
Correct Answer: A
QUESTION 27
ISIS does not send CSNP packets under the P2P network type during the neighbor establishment process.
A. True
B. False

Correct Answer: B
QUESTION 28
In 0SPFv3 , Router-LSA is generated by each router, which describes the interface address and cost of each link of the router, and also includes the
RouterlD of the neighbor router
A. True
B. False
Correct Answer: B
QUESTION 29
Is the following GR description of ISIS correct?
A. The GR feature of AISIS is turned on by default.
B. ISIS's GR has a total of four timers.
C. ISIS's GR notifies of events and maintains neighbor relationships through CSNP messages.
D. ISIS's GR defines a new TLV structure to support this feature.
Correct Answer: D
QUESTION 30
Both the CSNP packet of ISlS and the DD packet of OSPF have a role in the MA network, describing the role of the link state database summary, which
is correct compared to the following statements of these two types of messages
A. Both packets need to be confirmed to the terminal router after being sent, otherwise they need to be retransmitted
B. Once the adjacency relationship is established, the CSRP packet and the D message will stop sending
C. The two packets do not need to be confirmed to the router after they are sent the master-slave relationship in the DD message interaction of
D. OSPF is not identity bound to dr/BDR; the CSN message is generated only by DIS
Correct Answer: D
QUESTION 31
Regarding route introduction, what is the following description of the error?
A. BGP supports both import and network when generating routes, and the network mode is more precise.
B. By default, OSPF introduces an external route with a default metric of 1, and the level-2 network of the ingested external route type type, Type2
C. ISIS, routes to Level After the 1 makes a route ingestion, if you do not manually configure the ingestion policy, a bad route will be formed.
D. Introducing IBGP routing in OSPF may cause routing loops

Correct Answer: C
QUESTION 32
The following description of the RD attribute filter for BGP is correct?
A. If RD-filter is not configured, but the RD-filter is referenced for filtering, the matching result is deny.
B. If RD-filter is configured, but the routed RD is not matched with any of the RDs defined in the rule, the default match result is permit.
C. Multiple rules are matched in the order in which they are configured.
D. There is always an "or" relationship between the rules configured by RD-filter.
Correct Answer: CD
QUESTION 33
The following description of the Lsp shard extension for ISIS is correct?
A. Enables is routers to generate more LSP shards to carry more ISIS information.
B. Isis' shard extension is equally valid for Hello packets.
C. Shard scaling for ISIS is achieved by adding virtual systems, up to 1000 virtual systems.
D. The isis router can produce a maximum of 1024 shards.
Correct Answer: A
QUESTION 34
?? Route ? Policy ??:ip community-filter Ipermit 100: 1 ip as-path-filter 2 permit ^I00$ route-policy test permit node 10 if-match communityfilter 1 if-
match as-path-filter 2 apply as-path 200 Is the above configuration description correct?
A. The BGP route matches the above only if the BGP route carries a community attribute value of 100:1 or if the AS PATH is 100 route one policy. The
AS-one PATH attribute that matches the route is changed to 200
B. The BGP route matches the above only if the BGP route carries a community attribute value of 100:1 and the AS-One PATH is 100 route policy?
The AS-PATH nature of the matching route is changed to 200
C. Only if the BGP route carries an AS-PATH of 100, the BGP route matches the route one policy above. The AS-one PATH attribute that matches the
route is changed to 200
D. As long as the BGP route carries a community attribute value of 100:1, the BGP route matches the route-policy above The AS-PATH attribute of the
matching route is changed to 200
Correct Answer: B
QUESTION 35
When DLDP detects the presence of a one-way link in the fiber, the default actions of Huawei equipment include: the DLDP state machine migrates to
the Disable state, outputs Trap information, and automatically sets the interface to a blocked state.

A. True
B. False
Correct Answer: A
QUESTION 36
What are the main reasons why RSTP converges faster than STP?
A. RSTP increases the variety of port states
B. RSTP has a smaller overhead
C. RSTP does not converge based on timer
D. RSTP has a smaller timer
Correct Answer: C
QUESTION 37
The following description of the characteristics of cross-domain VN-Optionc is correct?
A. A maximum of two layers of tags need to be used in the message forwarding process.
B. VPMV4 routes are not saved on the ASBR, and VPNv routes are not advertised to each other.
C. VPN routes are exchanged directly between the ingress PE and egress PE and do not require an intermediate device to secure a circular VPN
route.
D. Cross-domain VN-Optionc, which is not suitable for use when spanning multiple AS.
Correct Answer: BC
QUESTION 38
What is the following description of MPLS incorrect?
A. The length of the MPLS tag is 20 to 20 for packet forwarding.
B. The tag space range of dynamic signaling protocols such as LDP, M P-BGP is 16 to 1023
C. When using the TTL processing method of Pipe mode, the IP packet transmits the TTL of the IP packet over the IPLS network. The value is only
minus 1 for the MPLS in and out nodes.
D. MPLS supports multi-layer label nesting, and the S bit value of the innermost label is 1.
Correct Answer: B
QUESTION 39
What of the following actions can enable fast failure detection on multicast networks?

A. Shorten the Holdtime of Join/Prune messages
B. Reduce the interval at which the interface sends Hello messages
C. A PIM BFD session is established between neighbors
D. Reduce the interval between sending Join/Prune messages
Correct Answer: B
QUESTION 40
If the PIM-SM protocol is running in a multicast network , you need to configure RP, and the configuration equation of RP is divided into dynamic RP and
static RP. The following configuration description of the RP is correct (radio).
A. When you configure Dynamic RP , you need to configure BSR as a backup of the RP.
B. When you configure a static RP , you need to configure the BSR to advertise the RP information.
C. When configuring a static RP, you need to specify the information for the RP on all PIM routers.
D. When you configure Dynamic RP, you do not need to configure BSR.
Correct Answer: C
QUESTION 41
What is the following correct for the process of registering the source-side DR with RP in PIM-SM?
A. Encapsulated in the registered message is multicast service data
B. RP sends a registration stop message as soon as it receives the registration message.
C. Registered messages are used to build the RPT tree between source DR and RP
D. Registered packets are multicast packets.
Correct Answer: A
QUESTION 42
In a multicast network, what causes multicast traffic to not forward properly?
A. The router does not have an RPF route
B. PIM is not enabled on the RPF interface
C. The upstream router will receive the PIM Join message dropped
D. Multi-router egress network, this router is not DR
Correct Answer: ABC

QUESTION 43
IPSGs can statically configure binding tables or form binding tables by using them with DHCP- Snooping
A. True
B. False
Correct Answer: A
QUESTION 44
Which of the following are single-packet attacks?
A. Special control message attacks
B. Scan Probe Attack
C. DDos Attack
D. Malformed Message Attack
Correct Answer: ABD
QUESTION 45
What is wrong with the following statement about digital certificates?
A. Digital signatures guarantee the integrity of digital certificates.
B. Digital certificates contain public key information.
C. Authentication fails when the peer certificate is received within the validity period, but the device itself is in the wrong time if it is not within the validity
period of the certificate.
D. Even if two PRI entities are not in the same CA system, authentication can be completed as long as both parties can recognize each other's CA.
Correct Answer: D
QUESTION 46
What is the relationship between CIR, BC and TC? (single select)
A. CIR=TC/BC
B. CIR=BE/TC
C. TC=CIR/BC
D. TC=BC/CIR
Correct Answer: D
QUESTION 47

WRED is configured on the newly deployed router HW. What is the correct description of the WRED features below? (Multiple choice questions).
A. WRED can set different drop thresholds and packet loss rates for packets of different priority
B. When the flow exceeds the minimum threshold, WRED begins to discard all inlet flow (tail drop)
C. Avoid global synchronization by selectively dropping multiple TCP streams
D. Low-bandwidth traffic is easier to drop than high-bandwidth traffic
Correct Answer: AC
QUESTION 48
Regarding the FTP protocol, is it correct in the description below?
A. In ftP-style, the client completes the initialization of the TCP session for control and data
B. In ftP Activee, the server side tells the client which port it expects to send data on by commanding "PORT"
C. FTP always uses a TCP session to transmit control information and data information
D. FTP always uses the TCP port to establish a data session and ICP port 21 to establish a control session
E. FTP always uses TCP port 21 to establish a data session and TCP port 20 to establish a control session
Correct Answer: A
QUESTION 49
If a Huawei switch runs the RSTP protocol, when will the BPDUs on a port on the switch be aged?
A. On the interface, RSTP does not age BPDU
B. After more than 6 seconds
C. After Ma ge times out
D. After Hello time times out
E. after the Forward Delay timeout
Correct Answer: C
QUESTION 50
In the use of the CP protocol, the following description is correct?
A. The Eth-Trunk interface can be avoided by frequent oscillation interfaceeth- trunkllacppreemptenablelacppreemptdelaydelay-time by following
command
B. Source A address can be configured for load sharing in an enabled link aggregation group with the following command: interface eth-trunk 110ad-
balance src-dst-ip
C. A member interface can be removed from an enabled link aggregation group with the following command: interface GigabitEthernet0/0/1 shutdown

interface GigabitEthernet0/0/1 undo eth-trunk 1 interfaceGigabitEthernet0/0/1undoshutdown
D. The member interface can be joined in the link aggregation group by enabling the following command: interface GigabitEthernet0/0/1 shutdown
interface GigabitEthernet0/0/1 trunkport
Correct Answer: A
QUESTION 51
Which of the following are used in Ethernet?
A. A MAC address in a non-canonical format
B. CSMA/CD in multiplexed interviews
C. Mac address in canonical format
D. 8025 encapsulated frames
E. 8023 Encapsulated Frame
Correct Answer: BCE
QUESTION 52
In RSTP , which port provides a backup path to reach the root node of the spanning tree? What state is the port in?
A. Root Port and Listening Status
B. Alternate Port and Forwarding Status
C. Alternate Port and Learning Status
D. Designated port and Listening status
E. Alternate port and Discarding status
Correct Answer: E
QUESTION 53
ISlS protocol In broadcast networks and P2P networks, when the router receives LSP, it needs to use PSNP to confirm and ensure the synchronization
of LSDB
A. True
B. False
Correct Answer: B
QUESTION 54
The following statement about isis protocol LSP messages is correct

A. The isP rapid diffusion feature, which first diffuses out LSPs that are smaller than a specified number , speeding up the synchronization process of
LSDB
B. By configuring an LSP-generated smart timer, the timer automatically adjusts the delay time based on the frequency at which the routing information
changes
C. As link status information increases, the packet length of the LSP can be increased so that each ISP can carry more information.
D. Reducing the minimum interval at which LSPs are sent per port can speed up the diffusion of LSPs.
QUESTION 55
Router RI and Router R2 run BGP. Both routers are in the AS65234 The route for router R2 exists in the BGP routing table of the router RI, but not in
the IP routing table of the router RI . So what causes the problem to occur? (Single Choice Questions).
A. Synchronization is turned off
B. The B. BGP neighbor relationship is Down
C. Router R1 does not enable BGP Multi-hop
D. Routing is not optimal
Correct Answer: D
QUESTION 56
Regarding the OSPFv3 protocol, what is the error described below?
A. Under the sukugan of a shared router, each OSPFv3 process runs independently
B. Multiple instances can be run in the same OSPFv3 under the same interface
C. Can support running multiple instances on a single link
D. OSPFv3 message header will contain instance IDFu Duan flogging
Correct Answer: B
QUESTION 57
The following is the correct statement about the LSA of OSPFv3?
A. Inter-AreaPrefix-SA's LinkStatelD contains the prefix
B. Router-LSA and Network-LSA does not contain routing information
C. When the Intra-AreaPrefixLSA's ReferencedLinkStateType-2, referencedLinkStatelD contains the interface to DR ID
D. Inter-AreaPrefirLSA also contains LinkLocal information file
Correct Answer: BC

QUESTION 58
Router HW enables OSPF and router HW has the role of ABR and is configured with abr-summary, then which class LSA Will it be aggregated?
A. 1 Class LSA
B. 2 kind LSA
C. 3 kind LSA
D. 4 kind LSA
E. 5 Class LSA
Correct Answer: AB
QUESTION 59
In Huawei devices, when SIS introduces external routes and sets external route tags for route information, the Metric type of ISIS does not need to be
modified and remains default.
A. True
B. False
Correct Answer: B
QUESTION 60
There is an existing router interface serial 0 in OSPF area 1 , well will interface Serial 0 is set to silent interface. So what is the impact of this setting?
A. OSPF establishes usable adjacencies through this junction
B. OSPF does not join the routes learned from the connector to the local routing table
C. OSPF does not establish any adjacency relationships through the junction
D. OSPF receives a route update answer from the neighbor.
Correct Answer: C
QUESTION 61
The Option field in OSPFv3 appears in all LSAs
A. True
B. False
Correct Answer: B
QUESTION 62

Is the following information about BGP4+ described correctly?
A. BGP4 can use dampening commands to suppress oscillations on IBGP routes.
B. Modifying the RouterID of BGP causes the BGP connection between routers to be re-established.
C. The Next Hop attribute in BGP4+ is represented by an IPv6 address, which can be the link-local address of the next hop.
D. BGP4+ does not support route auto-aggregate
Correct Answer: AB
QUESTION 63
Is the following description of ospf virtual links correct?
A. A virtual connection can be established in any area, after which it itself belongs to the region
B. The virtual connection ip is used as the link address
C. Virtual links can be used to solve the problem of zone 0 being segmented
D. The cost of a virtual connection is zero and is the optimal link
Correct Answer: C
QUESTION 64
What kind of scenario can use AS one path and one filter?
A. Filter routes received from BGP neighbors based on the AS PATH attribute that the route carries.
For example, the command peer x.X.x.x as path-filter import
B. The apply clause in Routepolicy
C. Filter routes sent to BGP neighbors based on the AS PATH attribute that the route carries. For example, the command peerx. X.x.x as path-filter
export
D. If-natch clause answer in Route-policy.
Correct Answer: ACD
QUESTION 65
Without dividing the zone, is the following description of the link state routing protocol correct?
A. Each router establishes a topology for the entire floodplain
B. Each router learns route entries directly from the route update and adds them to the routing table
C. Routers in the flood domain may receive the same link state information repeatedly
D. Routers throughout the flood domain have the same database of wrong-state states
E. The router will send all the mis-routing status information from one neighbor to all other neighbors to ensure the synchronization of the database

Correct Answer: ACD
QUESTION 66
If the OSPP protocol is running in the network , after configuring the non-backbone area in the OSPP area as the Totally Stub region, the ABR router
sends a message to Totally. The Stub region issues an LSA with an LS ID of 0000, and what type of LSA is the LAS to?
A. LSA5
B. LSA2
C. LSA1
D. LSA3
Correct Answer: D
QUESTION 67
If an administrator wants to manage certain routes on the router during operations, the following tools are listed below. These routes can be flagged so
that administrators can configure policies
A. If the BGP protocol is running, the route is marked with the community attribute
B. Use ACLs to tag routes on the router.
C. Use the Tag value to mark the route on the router.
D. Use ipprefix to tag routes on the router.
Correct Answer: AC
QUESTION 68
An existing router running BGP, HW1, has both IBGP neighbors and EBGP neighbors configured on the router. Are the IP Neighbors and EBGP
Neighbors described below correctly?
A. The router will be connected directly from its EBGP IBGP neighbor, otherwise, IBGP-Multi-hop must be configured
B. The router sends BGP updates learned from its EBGP neighbors to its other IBGP neighbors and EBGP neighbors
C. IBGP neighbors can establish neighbor relationships through Loopback engagements
D. The router sends BGP updates learned from its IBGP neighbors to its other IBGP neighbors and EPGP neighbors
E. EBGP neighbors must be directly connected, otherwise, EBGP-Multi-hop must configure
Correct Answer: BCE
QUESTION 69
After BGP introduces routes for other protocols, the next hop in the BGP routing table is consistent with the next hop of the introduced routing protocol

A. True
B. False
Correct Answer: B
QUESTION 70
In addition to stateless address autoconfiguration, IPV6 devices can also obtain addresses, gateways, DNS, and other information through DHCPv6
A. True
B. False
Correct Answer: B
QUESTION 71
In an IPv6 network, two nodes A and B are neighbors to each other if Node A sends NS messages to Node B if node B is B After receiving the
message, reply to the NA message, then view it on node A, what will the neighbor status be marked? (Single Choice Questions).
A. Reachable
B. Incomplete
C. Stale
D. Probe
Correct Answer: A
QUESTION 72
In an MPLS IBGP VPN environment, if tags are distributed only through BGP, LDP, the MPLS tags for a message can be up to two layers of tags.
A. True
B. False
Correct Answer: A
QUESTION 73
Regarding the cross-domain VPN-OptionB scenario, what is the following description incorrect?
A. In the process of packet forwarding, the private network LSP of the VPN should be exchanged once on the two ASBRs An EBGP neighbor
relationship.
B. Cross-domain VPN An Option
C. scheme is not limited by the number of interconnection links between ASBRs
D. The outer layer label is exchanged between two ASBRs to VPNv4 routes.

Correct Answer: D
QUESTION 74
Command IP as-path-filter1 permit^12,*74$ can match to which AS_PSTH?
A. AS_PATH(321122374)
B. AS PATH Q236217 ? 2374)
C. AS_PATH(125 328 74 23)
D. AS_PATH(32127423)
Correct Answer: B
QUESTION 75
You need to configure smart policy routing on the router to specify that specific traffic is forwarded through an interface. When policy-based routing is
applied, what are the two most typical types of information that can be used to forward traffic along a particular path?
A. The TTL and source IP address of the packet
B. Source A address and the Layer 2 source address
C. Source IP address and specific protocol (such as FTP, HTTP, etc.)
D. Service type header and message length
Correct Answer: C
QUESTION 76
Cross-device link aggregation realizes the back-to-back transmission of data traffic and the mutual spare of the heap member switches, but due to the
limited bandwidth of the heap cable between the heap devices, the forwarding efficiency can be improved in the following ways?
A. Enable traffic to be forwarded locally first
B. Connect the stacking device via a stacking card
C. Configure the stacking system MAC address switching
D. Enables the stacking multi-master check function
Correct Answer: A
QUESTION 77
s the following description of THE MUX VLA N in huawei switches correct?
A. MUX VLAN ??Principal VI-AN ?Subordinate VI-AN ???Separate VLAN ? Isolate VLAN
B. Each Separate VLAN can bind multiple Principal VLANs

C. Under the same VLAN, muX VLANs can be mixed with SuperVLANs
D. The Principal port can pass the answer to all ends within the MUX VLAN
Correct Answer: D
QUESTION 78
The fields that represent priority in the VLAN (8021Q) data encapsulation are a total of 6 bits.
A. True
B. False
Correct Answer: B
QUESTION 79
Router R1 runs the OSPF protocol, use the "display ip routing-table" command to view the routing table of the router R1, the following about the OSPF
in the routing table Is the information described correctly?
A. In the routing table, route table entries identified by the "OSPF" identifier can only be learned through LSAs of Type 3
B. In the routing table, the routing table entries identified by the "OSPF" identifier can only pass Class 1 LSA
C. In the routing table, the routing table entries identified by the "OSPF" identifier can be learned through the 1/2/3/5 LSA
D. In the routing table, the routing table entry identified with the "O_ASE" identifier can only be learned by routing introduction
Correct Answer: D
QUESTION 80
The following statement about the five types of LSAs in OSPF is used to pass external routes, and the following statement about the five types of LSAs
is incorrect and flooding in
A. OSPF networks in non-Stub/NSSA regions
B. Routers in the same zone as ASBR can calculate external routes by chanting the LSA and the five types of ISAs in the region
C. The FA address is included in the five types of LSAs, and the FA address is 000 only as reserved for no practical purpose
D. Configuring the appropriate filtering policy on the ABR or ASBR can filter five types of LSAs
Correct Answer: C
QUESTION 81
Regarding the certification of the ISIS protocol, there is a correct statement
A. Connection authentication can realize the authentication of the hello messages of Leve-1 and Leve-2
B. After configuring the connection authentication, the IIH issued by the router must carry the authentication TLV

C. After configuring zone authentication, the router issues an IIH, SNP, LSP--strap-to-tape authentication TLV
D. The two routers are configured for area authentication and interface authentication, and the passwords are the same, so the two can establish an
isocopied relationship
Correct Answer: AB
QUESTION 82
If the Option field value in the 0SPFv3 Hello message issued by the router's GIgabit Ethermet0/0 interface is 0x000013, the following description is
correct
A. The Gigabit/thernetO/0/0 interface of Router A adds IPv6 routing to compute
B. Router A's Gigabit/thernetO/0/0 interface belongs to the NSSA zone
C. Router A supports AS-An External-LSA flood
D. Router A is an OSPFv3 device with forwarding capability
Correct Answer: ACD
QUESTION 83
Regarding the BGP ring protection mechanism, is the following description correct?
A. The AS_ PATH attribute is used between autonomous systems to prevent ring cats
B. The Cluster List property is used for loop guard within the reflector cluster, and the router rejects the route when it finds that the Cluster List of the
route entry contains its own Cluster ID.
C. Routes learned from IBGP are not advertised to IBGP neighbors and are used to prevent routing loops inside the AS.
D. You can use the AS_ CONFED_SET attribute to prevent loops within a consortium.
Correct Answer: ACD
QUESTION 84
Regarding Route Policy, is the following description correct?
A. Advanced ACLs can be applied in route-policy to filter routes
B. The table entries pernit::0 Less an equal 128 indicate that all IPV6 routes are allowed through
C. If more than one node is defined in Route one policy, there should be at least one node in each node that matches permit
D. Route one policy filters only the default route
Correct Answer: BCD
QUESTION 85
Which of the following routing tools is unique to BGP?

A. Route-policy
B. ACL
C. IP-prefix
D. AS-path-filter
Correct Answer: D
QUESTION 86
The following is the correct description of the aggregation of BGP? (Single Choice Questions).
A. After you configure aggregate ipv4-address mask , only aggregate routes are published, not detail routes.
B. For IPv6 routing, BGP supports manual coalescing and automatic aggregation
C. By default, BGP enables automatic aggregation
D. You can manually aggregate the routes in the BGP local routing table with a profile
Correct Answer: D
QUESTION 87
The following about BGP routing, what is the wrong description?
A. Non-aggregate routes take precedence over aggregate routes.
B. In the case of PrefVal, Local_Preference equality, if the BGP preference of the locally generated route, IBGP route, EBGP route is equal, the valid
reference of this generation is preceded by priority.
C. See the following entry in the BGP routing table: · *172 16 1. 11/32 0 00010 0? Indicates that the route is available non-optimal.
D. For next_hop unreachable routes are invalid cat by and do not participate in the preference.
Flogging case
Correct Answer: A
QUESTION 88
The following description of Filter-Policy is correct?( Radio neck).
A. With Filter-Policy, on ASBR in OSPF, you can filter the generation of type5 LSA and type7LSA.
B. Prefix lists can be used to filter both routes and packets.
C. Filter-policy filters the link state information received or published, and can modify the properties of route entries.
D. When using a prefix list to filter routes, the table entry ip-prefix 1 deny 0000 0 less-equal 32 matches only the default route.
Correct Answer: A

QUESTION 89
When deploying the ISIS protocol in an IPv6 environment , the following statement is correct (single choice).
A. By default, the DIS priority for broadcast network interfaces at Level-1 and Level-2 is 1
B. In broadcast networks, IPv4 and The DIS priority for IPv6 can be set separately
C. In the same broadcast network. If each router supports both IPv4 and IPv6 The DIS for IPv4 and IPv6 must be the same device
D. IS-IS is configured under the finger port is ISIS silent, this interface will not send ISIS packets, but will receive ISIS packets
Correct Answer: C
QUESTION 90
A lot of overwave techniques have emerged in the process of replacing the IPV4 addresses used in the network with lP6 addresses. These technologies
are divided into two categories, one is IP4IPV6 coexistence technology, the other is PA/IP>6 interoperability technology, which of the following options
sleep in IPv4/IPv6 coexistence technology?
A. NAT64
B. IPv6 over IPv4
C. Dual Stack
D. ISATAP
Correct Answer: BCD
QUESTION 91
In cross-domain VPN-OptionB packet forwarding, two ASBRs exchange the same LSP tags once.
A. True
B. False
Correct Answer: B
QUESTION 92
In the city, that is, mpLS BGPVPN network, when the packet enters the public network forwarding, it will be encapsulated with two layers of MPLS tags,
the following description of the two layers of tags, the error is ?
A. Private network tags are carried and distributed by MP-BGP when routing, and public network tags are distributed by the LDP protocol.
B. MPLS BGPVPN uses two layers of tags: public labels (also known as outer labels) and private network labels (also known as inner labels).
C. By default, the router assigns the same tag value to all VPNv4 routes destined for the peer
D. The egress PE uses the inner tag when determining which egress CE the message should be sent to.

Correct Answer: C
QUESTION 93
The following description of the LDPLSP establishment process is correct?
A. By default, LSRs are for the same FEC, and the received tag mappings can only come from the optimal next hop, not from the non-optimal next hop.
B. When a network topology change causes the next hop neighbor to change, the free label keep method is used. LSR can quickly rebuild the LSP by
directly using the labels sent by the original non- optimal next-hop neighbor. Liberal needs more memory and tag space.
C. In the DoD mode of label publishing, for a specific FEC, the LSR does not need to obtain a label request message from upstream to distribute the
label.
D. The process of establishing a D. LSP is actually to bind the FEC to the tag and advertise this binding to the LSP upstream LSR process.
Correct Answer: BD
QUESTION 94
What improvements have been made to the IGMPv2 protocol compared to IGMPv1? ( Multiple Choice)
A. Added maximum response time field
B. Added high group messages
C. Added specific group query message
D. Added a specific source group query packet
Correct Answer: ABC
QUESTION 95
Which of the following attacks are DoS (Denial of servioe) attacks?( Multiple choice question)
A. Single packet attack
B. Source P address spoofing attack
C. Man-in-the-middle attack
D. Flood Attack
Correct Answer: AD
QUESTION 96
Configure queue-based traffic shaping, which defaults to tailing if the queue length exceeds the cache size
A. True
B. False

Correct Answer: A
QUESTION 97
For Layer 2 VPN technology, the following statement is correct?( Multiple choice questions).
A. VPLS is a widely used technology in the live network, which can provide transparent transmission of three-layer messages and achieve multi-point
access.
B. The VPLS configuration is complex and the Layer 2 network transmits BUM packets.
C. BGP EVPN supports features such as tenant isolation, Multi-homing , and broadcast suppression.
D. BGP EVPN addresses issues such as MAC address drift and multi-tenancy that VPLS cannot support.
Correct Answer: BC
QUESTION 98
In the forwarding table of the switch, a MAC address can correspond to only one outlet at a time
A. True
B. False
Correct Answer: B
QUESTION 99
How do.8021w and 8021D handle BPDUs?( Single choice questions).
A. The 8021D bridge only forwards BPDU packets received from the root bridge
B. 8021D bridges do not forward BPDU packets
C. The 8021w bridge only forwards BPDU packets received from the root bridge
D. 8021w Bridge does not forward BPDU packets
Correct Answer: A
QUESTION 100
Which of the following scenarios send free ARP messages?( Multiple choice questions).
A. After the VRRP protocol master and standby role election is completed
B. The DHCP client receives an acknowledgment message from the server after it sends it
C. When a new host configured with an IP address is connected to the network
D. When a host connected to the switch issues a Ping message.
Correct Answer: ABC

QUESTION 101
When you troubleshoot a local area network with Huawei equipment deployed, you find that there are a large number of unicast frames with unknown
source AC addresses in the local area network . A large number of unknown source MAC addresses single-plug frames can cause the switch the
biggest danger is ?
A. Memory that occupies the cache ton
B. Increases the power consumption of the power supply
C. Consumes a TCAM table entry
D. Consume the available bandwidth
E. Consume the MAC address table entry available in the system
Correct Answer: E
QUESTION 102
Which of the following IEEE standards is specific to Gigabit Ethernet?
A. 8023z
B. 8023ab
C. 8023ad
D. 8023af
Correct Answer: AB
QUESTION 103
What are the reasons why the BGP connection is down after it is successfully established ? ( Single choice questions) Single choice
A. The wrong BGP packet was received.
B. The mandatory attribute in the route update packet is missing.
C. Open message negotiation failed.
D. After the BGP connection is established, the keepalive message is not received within the negotiated holdtime time.
Correct Answer: C
QUESTION 104
BGP can only automatically aggregate routes whose source is Incomplete.
A. True
B. False

Correct Answer: A
QUESTION 105
There are two Communily filters: ip comimuniy-lite lpemit 101201 ip community fiter 2permit101 ip commmuriyfilter 2pemit21 Regarding the above
ommuniyfiter, the correct description is ?( Multiple choice questions).
A. As long as the group attribute value carried in the BGP route contains 100:1 or 200:1, or both, the BGP route matches the community-filterl
B. As long as the group attribute value carried in the BGP route contains 100:1 or 200:1, or both, the BGP route matches community-filter2
C. The BGP route matches community-filter 1 only if the community attribute values carried in the BGP route contain 100:1 and 200:1
D. A BGP route matches community-filter2 only if the group attribute values carried in the BGP route include 100:1 and 200:1
Correct Answer: BC
QUESTION 106
Regarding Policy Routing, the following description error is ?( Single choice questions).
A. When configuring local policy routing, if two next hop and two outbound interfaces are set in the policy at the same time, packet forwarding only
distributes the load between the two outbound interfaces.
B. Interface policy routing is only supported for application in the inbound direction of an interface.
C. Interface policy routing only takes effect for forwarded packets, but has no effect on packets sent locally.
D. If the message matches the permit table entry in the interface policy route , the message must be forwarded according to the next hop specified by
the interface policy route
Correct Answer: D
QUESTION 107
Regular expressions can be used for Community-filter and AS-path-filter definition attribute types for route filtering.
A. True
B. False
Correct Answer: A
QUESTION 108
What type of prefix does a router running BGP advertise to its IBGP neighbor (assuming the router is not configured as a route reflector)? (radio).
A. Prefixes are learned through other IBGP neighbors, or prefixes are learned from EBGP neighbors, or prefixes are learned through routing
introduction
B. A prefix that exists in the routing table

C. Prefixes are learned through other BGP neighbors, or prefixes are learned locally through network or routing introduction
D. Prefixes are learned through EBGP neighbors, or prefixes are learned locally through network or routing introduction
E. The prefix is learned through an EBGP neighbor, or the prefix is learned from an from RR
Correct Answer: D
QUESTION 109
One of the things you're doing is compressing the length of ip6 addresses as much as possible . The existingIP6 address is
2013xX0C130F006009cO87641308, to be able to make this P6 address more concise, you can compress the IP6 address into which of the following?
( Single choice questions).
A. 2013:0:130F:0:0:09CO:876
B. 2013:130F::9CO:876Answer: 130B
C. 2013:0:130F:0:0:9CO:876Answer: 130B
D. 213::13F::9C:876Answer: 13B
E. 2013:0:130F::9CO:876Answer: 130B
Correct Answer: E
QUESTION 110
The router is running both OSPFv3 and ISIS, and the OSPFv3 route needs to be introduced to ISIS, which of the following ingestion configurations is
correct:( Multiple choice questions).
A. Huawel ias 1 ltuawei-i- isHeveleve!. l Huave-s-1 networkenity 47001.0000020 Hawe -sis-1 ipv6enabletopolog standard Htuawer is-] pob impot.
B. (Huawei isis l Huawei-si-1 s-levelve!-l Huavei- ti.-1] networkentiy 4 .001.00001. Huawei sis pob enable topogy s andard Hhuawelitis ]l p6 importroute
ospfv3 1 [Hu
C. [Huawei] sis 1 [Huawel-isis-1] networkentity47001.000000200 Huawe-ss 1 ipb6enable topologist standard Huawei is l p6 importroue esgp.31lese!
[Huaweisis-1] quit [Huawei
D. HuaweJ IsIS
[Huaweij isis 1 Huavei-isis-1]networkentity470001.000000020Huawei-sis- 1limpotroueosph31 ltuowe.is- ut tuawl sph 1 fhuwf spol Jronea d2222
[Huawei) isis 1 Huawe-sis-1] is level level-1 [Huavei-sis-1 etworkentity 47001.0000020 Huawel-d.-1[impotroteosph-1 le e. [tuawelts a ut ltunweospfv3
1 [Huawei
Correct Answer: AC
QUESTION 111
Which address prefix in the following options indicates that the address is globally unique and globally routable among unicast addresses in IPv6,
similar to a public address in IPv4?(). Single choice questions).
A. ::1/128

B. FE80:/10
C. FE80::/10
D. 2000:;/3
Correct Answer: D
QUESTION 112
The following description of the characteristics of multi-instance CE is ?
A. Since the MCE device is already bound to the VPN, there is no need to bind the VPN on the PE connected to the MCE device
B. The MCE device can determine the source of the routing information according to the interface that receives the routing information, and maintain it
in the route forwarding table of the corresponding VP.
C. MCE is implemented by creating their own routing forwarding tables for different VPNs on the MCE device and binding to the corresponding
interface o
D. Configuring MCE enables a CE to connect to multiple VPNs at the same time, which can not only completely isolate the service between different
VPN users, but also reduce the input cost of network equipment.
Correct Answer: A
QUESTION 113
Users within a typical VPN can only communicate with each other, not with Internet users, and with Internet. But VPN individual sites may have access
to internet's needs. The correct description of the implementation of VPN interconnection with internet is ?( Multiple choice questions).
A. is implemented on the user side, and the CE is directly connected to the Internet. Each user site can be connected to the Internet separately, that is,
the CE of each site is configured with a default route to the Internet.
B. Implementing a complex implementation on PE and having security implications, PE devices may be subject to Dos attacks on the Internet.
C. Implemented on PE, the PE device issues a default route to the CE to the Internet and adds a default route to the VPN instance routing table
pointing to the Internet Gateway o
D. Implemented on the user side, the implementation method is simple, and the public network and private network routes are isolated, safe and
reliable.
QUESTION 114
The following message about the Register in PIM-SM describes the correct ?( Multiple choice questions).
A. The Register message enables the RP to learn the multicast source information
B. The Register message is sent by the receiver router
C. Register messages are sent to RPv via unicast instead of multicast
D. The Register message is sent by the source DR

Correct Answer: ACD
QUESTION 115
Host HW1 in the HW device network Wants to join a video conference, so what does that host do?
A. Sends an IGMPv2 membership report to the default router unicast of the local network
B. Sends a unicast IGMPv2 membership report to the RP
C. The IGMPv2 membership report is sent over multicast in the local network, and the multicast address carried in the IGMPv2 membership report is
the multicast address that you want to join
D. The IGMPV2 membership report is sent over multicast in the local network, and the destination multicast address of the IGMPv2 membership report
is "All PIM Routers" 224002 Multicast address
Correct Answer: C
QUESTION 116
A bookstore provides a wired network for customers to learn online. However, one day, it was found that some users could not access the network, and
after inspection, it was found that the IP resources of the DHCP address pool had been exhausted. Which of the following is the best way to solve the
problem of the moment? ( Single choice questions).
A. Configure the static ARP binding table
B. Configure the IPSG
C. Limits the maximum number of DHCP Snooping binding table entries that the interface allows to learn
D. Configuration DAI
Correct Answer: C
QUESTION 117
You want only his telnet stream to be able to access the server (address 1011.100). Then, you add the following ACL to the routing ring: nule5pemit cp
source ny destination 1011.100000destination- porteq 23 rule 1l0 deny ip source any destination any Then you apply that ACL to the ingress direction of
the router's seial interface. What type of message is allowed to pass through the router?( Multiple choice questions).
A. A non-sharded, port 21-accessing packet
B. Non-first-sharded messages that use port 23 to access the server's message
C. Non-first-of-sharded messages to access other hosts
D. Non-first-of-its-kind packets that use port 21 to access the server
E. Packet answer for the first sharded or non-sharded, using port 23 to access the server
Correct Answer: BDE

QUESTION 118
Dual-bucket, two-speed is used in traffic governance, where the number of tokens in a C bucket is TC and the number of tokens in a P bucket is TP.
When a message of length B enters, which of the following sentences is correctly described? (Multiple choice questions).
A. If TP-B~O and TC-B < 0, the message is marked green
B. If TP-B<0 and TC-B-0, the message is marked in red
C. If TP-B>0 and TC-B < 0, the message is marked yellow
D. If TP-B >O and TC-B > 0, the message is marked as a green
Correct Answer: BCD
QUESTION 119
Which SNMP message type sent to NMS reports events that are reliable? ( Single choice questions).
A. Inform
B. Get
C. Response
D. Trap
E. Get Bulk
Correct Answer: A
QUESTION 120
NSF (Non-StoppingForwarding ) and non-stop circuits are transmitted NSR (Non-Stopping Routing) are two highly reliable solutions, and the following
statement is correct
A. After NSR enablement, if the business batch backup has not yet ended, a master board failure occurs, the NSR cannot be completed
B. NSR backers require the ability to support NSR through specific message negotiation
C. After NSF is enabled, the router is switched back, and the routing table and forwarding table remain unchanged, so traffic is not lost during grf time
D. NSF routers do not need to negotiate the ability to support NSF through specific messages
Correct Answer: A
QUESTION 121
Assume that BGP/MPLSIPVVPN, OSPF, LDP, and static routing protocols are already enabled on the PE router . Which of the following protocols need
to enable GR on PE in order to get NSF functionality? (Multiple choice questions).
A. BGP
B. Static circuit

C. OSPF
D. MPLS LDP
Correct Answer: ACD
QUESTION 122
Huawei's SDN controller using VXLAN technology is fixed?
A. Agile Controller-Campus
B. Agile Controller-WAN
C. Agile Controller-DCN
Correct Answer: C
QUESTION 123
Two VTEPs in an XLAN can identify a VXLAN tunnel, and this VXLAN tunnel between the VTEPs will be covered by two NDEs is common to all VNI.
A. True
B. False
Correct Answer: A
QUESTION 124
The following statement about the VXLAN gateway is incorrect?( Single choice questions).
A. Layer 2 gateway: Used to solve the problem of tenant access to the VXLAN virtual network, and can also be used for subnet communication of the
same VXLAN virtual network.
B. Layer 3 gateway: Used for cross-subnet communication of the VXLAN virtual network and access to external networks.
C. VXLAN Layer 3 gateways can be divided into centralized gateways and distributed gateways.
D. Layer 2 gateway and VPN instance binding.
Correct Answer: D
QUESTION 125
To build a loopless Layer 2 network, which of the following schemes is optimal?( Single Choice)
A. Stacking + Link Aggregation
B. TRILL+MSTP
C. ??+MSTP

D. Link Collection + MSTP
Correct Answer: A
QUESTION 126
The default configured switch has an empty MAC address table at this time , and Host A connected to the switch issues the first unicast data frame, so
what will the switch do after receiving the teaching system?( Single choice questions).
A. The switch will drop the data frame
B. The switch records the source MAC address of the data frame and floods the data frame
C. The switch will forward data to interface
D. based on the mesh MAC address of the data frame The switch caches the data frame and waits for the destination host to send the effect frame
before forwarding it
Correct Answer: B
QUESTION 127
If a Huawei S series switch needs to designate a member switch as the primary switch of the stack, it can power on this switch first, and then power on
other member switches after 20s.
A. True
B. False
Correct Answer: A
QUESTION 128
The following description of 8021S deployment characteristics is correct?( Multiple choice question)
A. All VLANs share a spanning tree instance
B. Multiple bridges share a spanning tree instance
C. Each VLAN has one spanning tree instance
D. Multiple VLANs share a spanning tree instance
Correct Answer: D
QUESTION 129
The following description of the attributes of BGP is correct?( Single choice questions).
A. The AS deficit of the adjacent AS is ranked at the far right of the list of AS_Path in the BGP route entry.
B. When the B. BGP Speaker publishes a route learned from an EBGP peer to an IBGP peer, it does not change the next hop attribute of that routing

information.
C. Local_Pref is valid only between EBGP peers and is not advertised to third-party AS.
D. A route can have only one community attribute value.
Correct Answer: B
QUESTION 130
The following statement about the alliance is correct?( Single choice questions).
A. The consortium divides an AS into sub-AS, and the alliance external AS still considers the consortium to be an AS
B. Subsystems within a consortium can use private AS numbers. Huawei NE/AR routers, a consortium can be configured with up to 32 subsystems
C. Consortium can easily detect the routing loop within the AS because EBGP is running between the subAS.
D. The subas number of the consortium, which by default notifies BGP peers outside the consortium
Correct Answer: D
QUESTION 131
When the ABR is a Type 5/7 LSA Switch router in the NSSA zone, then the ABR can be used against the Type 7 LSA The converted type 5 LSA is
aggregated.
A. True
B. False
Correct Answer: A
QUESTION 132
The following about the Router-LSA of OSPFv3 is correct?( Single choice questions).
A. The router-LSA data area contains the Link-Local address
B. The router-LSA data area contains the Interface ID of the neighbor on this side
C. Similar to OSPFv2, the Option field exists in the header of LSA, not in the data area of Router-LSA
D. When LS type= Ox0001 in the head of LSA, the data area representing LSA is Router-LSA
Correct Answer: B
QUESTION 133
When judging the old and new LSA, the serial number parameter and the age parameter are used , and the following two parameters are correct for ?
( Multiple choice questions). A When the router receives two LSAs, where the sequence number is the same and the checksum is the same, the
smaller the age, the better

A. When the router receives--The age of the LSA is set to 3600S, the LSA is unavailable
B. If the serial number of the LSA reaches the end value of Ox7FFFFFFF, the current router advertises an LSA with an age of 3600S
C. Both the serial number and age parameters can determine whether the LSA is old or new, and the router prioritizes the sequence to participate in
the teaching, and the larger the better
Correct Answer: C
QUESTION 134
?? ipIp- prefoi p prefierame lndeindeoxrunmber)( pemit demy)ip+4adrssmasklengh gratrequa grater- cqual abel]lescqualesequl ole) for · Pprefofiier? If a
pre-list of tooequal has been specified, but the greater-equal has not been specified, then how much of the prefix's range is sufficient?(). Radio neck).
A. [0, less-equal-value]
B. [mask-length, less-equal-value]
C. [less-equal-value,32]
D. No limit
Correct Answer: B
QUESTION 135
Which nationality meets the following two conditions: 1] BGP Router A can choose whether the Ulpdate message is based on the nationality. ( ) If
Router B receives a Updae message containing a cross-hatch, run-by B does not have an identified solidity, but will also contain a multifaceted] Ulpdate
retracts the advertisement to Router C. Router C may recognize and apply this attribute.
(Multiple choice questions).
A. Aggregator
B. Local_Pref
C. Multi_Exit_Disc
D. Community
Correct Answer: AD
QUESTION 136
The following description of MP-BGP is incorrect?( Single choice questions).
A. The MP_UNREACH_NLRl of the update message, excluding the path nationality.
B. MP-BGP can be used to assign tags.
C. MP_REACH_NLRI and MP_UNREACIH_NLRI are optional transition properties.
D. A complete MP_REACH_NLRI attribute structure contains address family, next hop, and prefix information.

Correct Answer: C
QUESTION 137
The following description of the BGP route reflector is ?( Multiple choice questions).
A. Cluster_List is an optional non-staging property for ring protection within the cluster.
B. The route learned from the client, all non-clients and clients published to this RR.
C. A network of bones is divided into multiple reflection clusters, each of which configures the other RRs as non-clients, and establishes an IBGP full
connection between the RRs.
D. The Originator_ID attribute is generated by the Route Reflector (RR) for inter-cluster ring protection.
Correct Answer: BC
QUESTION 138
The router connects two EBGP neighbors through two parallel Serial cables, what do you do to achieve bidirectional negative sharing between two
EBGP neighbors connected by these two parallel Serial cables? ( Single choice questions).
A. Without any method, BGP automatically implements load sharing of traffic across different autonomous systems on the available links
B. Use the Loopback interface to establish an EBGP neighbor relationship, configure EBGP Muti-hop, configure the Loopback interface as the update
source, and then use IGP to implement Equivalent path load sharing between Loopback addresses
C. Configure the EBGP neighbor relationship with the Loopback interface as the update source, and the IGP in each AS needs to introduce two
equivalent paths to the loopback address of the EBGP neighbor; And you need to use the command "next-hop?local"
D. Use the command "ebgp-load-balance" at both ends
E. To configure an EBGP neighbor relationship with the Loopback interface as the update source, the IGP in each AS needs to introduce two
equivalent paths to the EBGP neighbor loopback address ; And the commands "ebgp maxhop" and "next-hop-local" are used
Correct Answer: B
QUESTION 139
IPv6 introduces the Solicited-Node address, which is described correctly below (multiple choice)
A. This is a specific address that is used for resolution in ARPv6 The MAC address.
B. The Solicited-Node address on the router interface is automatically generated and can have multiple.
C. If the Solicited-Node address is not configured , the router automatically generates one on each interface.
D. IPv6 introduced the Solicited-Node address to support IPv6 multicast.
Correct Answer: B
QUESTION 140
What messages does an NMS (Network Management Station) running SNMPv1 send to the agent?

A. Trap,Get ? Set
B. Get,Set ? Getnext
C. Get,Set,Getnext ? GetBulk
D. Get,Set ? GetBulk
E. Get Trap
Correct Answer: B
QUESTION 141
NXLAN under different VPNs need to be accessed, one of the subnets is as follows, EVPN under RT
10: 10 both, RT 1000: 1000 export, VPN RT 100: 100 The other subnet can be configured as ?
A. Vpn configure 1000:1000 both evpn
B. EVPN configures 1000:1000 both
C. Configure 1000:1000 export under EVPN
D. Configure 10:10 both under VPN.
Correct Answer: AB
QUESTION 142
If you have a LOCAL AREA NETWORK running 8021D Spanning Tree Protocol, the non-root switch does not receive which parameter under the root
switch?
A. MaxAge
B. Root cost
C. Forward delay
D. Hold time
E. Hello time
Correct Answer: D
QUESTION 143
The following description of the CHAP authentication function in the PPP protocol is correct?( Multiple choice questions).
A. The user name must be configured under the authenticated party interface for CHAP authentication
B. If the authenticator does not have a username configured, password
C. can also be configured without the authenticated party interface Using the authentication sequence ID, random number, and key, a Hash value
D. is calculated using the MD5 algorithm Three message interactions are required for authentication, and only the user name is transmitted on the

network without the password
Correct Answer: ACD
QUESTION 144
The following message about OSPFV3 is correct?
A. The Option field of the Hello and DD packets extends to 24-bit
B. LSR packets containing the full LSA header information for requesting an update to the LSA
C. The LSACK message contains LSA header information to confirm receipt of the LSU message
D. The Hello message must contain the interface ID of the sending interface
Correct Answer: ACD
QUESTION 145
When configuring ISIS zone authentication, which ISIS message will carry the authentication letter? ( Single choice questions).
A. ISIS ?Level-1 ?SNP ?LSP?
B. ISIS ?Level-2 ?SNP ?LSP?
C. Hello message of ISIS's Level-1.
D. Hello message of ISIS's Level-2
Correct Answer: A
QUESTION 146
ISIS elects DIS in broadcast multiplexed access networks, and the following statement about DIS is correct?( Multiple choice)
A. ISIS elects dis by comparing priorities, and mac addresses if the priorities are consistent
B. In a broadcast multiple access network, DIS sends Hello PDUs at three times the frequency
C. DIS guarantees database synchronization by periodically sending CSNP messages
D. DIS supports preemption function, after the new DIS preemption is successful, there is no need to flood any LSP packet
Correct Answer: ABC
QUESTION 147
The following is an error in the OSPF routing calculation (single choice).
A. Compared to the PRC algorithm, the ISPF algorithm only calculates the changed leaf nodes when the route changes PRC algorithm to recalculate
routes

B. When the first and second class LSAs on the network change, OSPF uses the ISPF algorithm to recalculate the routes The
C. OSPF router uses the FULL SPF algorithm to calculate all nodes in the network when initially calculating routes
Correct Answer: A
QUESTION 148
Level-1-2IS transmits Level-2LSP to the Level-1 area if the AT location 1 in Level-2LSP is delivered It means that the Level-1lS in the area can be
accessed to the outer area through Level-1-2IlS
A. True
B. False
Correct Answer: B
QUESTION 149
The correct description about the BGP reflector is ?( Multiple choice questions).
A. IBGP neighbor relationships need to be fully interconnected without a route reflector. The introduction of route reflectors can reduce the need for full
interconnection
B. The route reflector can advertise routes learned from non-clients to all clients
C. The route reflector can advertise routes learned from one client to other clients and non-clients
D. The route reflector can advertise routes learned from IBGP neighbors to all clients and non-client
Correct Answer: ABC
QUESTION 150
A router receives a BGP route with the community attribute NO-Export , how will the router handle the BGP route?
A. Drop the route directly.
B. No more advertising to other BGP routers.
C. Advertise only to IBGP neighbors.
D. The route is advertised normally, but the route is not used to forward data.
Correct Answer: C
QUESTION 151
You want to set the DSCP value of VolP traffic in HW network devices to EF. According to the differentiated service model RFC, traffic token EF should
be set to:
A. DSCP is set to decimal 36

B. IP ToS is set to OXEF
C. IP Experimental ECN
D. DSCP is set to decimal 5
E. Bitstream 101110
Correct Answer: E
QUESTION 152
You are now troubleshooting a LAN, and you suspect that the error is due to a mismatch in the work mode. Which switch interface error indicates that
the 10/100/100O IEE gigabit interface operating mode does not match?( Multiple choice questions).
A. Alignment error
B. FCS error
C. Super Small Frame
D. Excess Conflict
E. Lag conflicts
Correct Answer: ABCDE
QUESTION 153
The HW appliance network administrator plans to migrate IGMPv2 in the multicast network to IGMPV3 Where does IGMPV3 improve over IGMPv2?
A. IGMPv3 adds the ability for hosts to specify multicast groups that do not join a specific multicast source
B. IGMPv3 adds the ability for hosts to specify multicast groups that are joined to a specific multicast source
C. IGMPv3 adds Request-to-send and Clear-to-send between source and local IGMP queries
D. IGMPv3 removes the Report-suppression feature for membership reporting
E. IGMPv3 removes the ability to include all sources in a wildcard group
Correct Answer: ABD
QUESTION 154
The multicast IP address is 2291301301, and its corresponding MAC address is :(Multilist)
A. 01-00-5E-O2-82-01
B. 01-00-5E-82-82-01
C. 00-00-5E-02-82-01
D. 00-00-5E-82-82-01
Correct Answer: A

QUESTION 155
What does RT do in MPLS VPN? Multiple choice questions).
A. Allows the peer PE to decide which VPNv4 routes to import into a particular VRF
B. Allows peer PE to decide which VPNv4 routes not to import into a particular VRF
C. Allows the peer CE to decide which VPNv4 routes to import into a particular VRF
D. Allows the peer CE to decide which VPNv4 routes not to import into a particular VRF
Correct Answer: AB
QUESTION 156
The network administrator is ready to use the 6to4 automatic tunnel to carry IPv6 data on the IPv4 network, and the IPv4 address of the router interface
is 1381485210, so the corresponding tunnel address is 2001:8a0e:55d2:1:230:65ff:fe2:9a6?
A. True
B. False
Correct Answer: B
QUESTION 157
The following description of the process of sending and receiving data frames in switch interface Access mode is correct? ( Single choice questions).
A. In Access mode, labeled data frames are discarded directly when they are received.
B. Access mode strips off the VLAN tag of the dataton when sending .
C. Access mode receives only unlabeled data frames.
D. When a data frame enters the switch interface, the switch learns the destination MAC address in the data frame.
Correct Answer: B
QUESTION 158
What is the wrong description of the function of OSPFv3 protocol authentication?
A. OSPFv3 can only establish a security alliance SA using manual mode
B. Huawei router OSPFv3 IPSec authentication can not only support transmission mode, but also support tunnel mode
C. OSPFv3 authentication relies on IPv6 packet authentication headers and encapsulation security net load headers
D. The OSPFv3 protocol header removes the Type and Automation fields
Correct Answer: B

QUESTION 159
The OSPF3 protocol is a separately developed protocol that differs somewhat from OSPF2 in that OSPFv3 is link-based rather than network
segmented, and the following statement is incorrect?().
Single choice questions).
A. Two OSPF routers connected to the link can establish a neighbor relationship even if their IPv6 address prefixes are different
B. The routing information obtained by the B. OSPFv3 router from the neighbor uses the neighbor's Link-Local address as the next hop in the
forwarded packet
C. For two OSPF routers connected to the link, you can establish a neighbor relationship even if you do not configure a unicast IPv6 address
D. All OSPFv3 interfaces use the Link-Local address as the destination address of the message
Correct Answer: D
QUESTION 160
In order to reduce the number of OSPF routes in some unscheduled areas, the OSPF protocol has developed special area functions, and the following
characteristic description of ospf special areas is correct?( Single choice questions).
A. ASBR-Sunmary-LSA is allowed to be published to NSSA regions
B. AS-External-LSA is allowed to be published to Stub regions
C. Any OSPF zone can be configured as a special zone
D. Special area routers cannot establish OSPF neighbor relationships with regular area routers
Correct Answer: D
QUESTION 161
There is an existing network of router RI, router R, router R3, and router R4 The 4 routers are interconnected via an LN network. All 4 routers are
equipped with basic oSPF. When you execute the command "displayosp" on router R2 f peer", router R2 and router R3 are discovered The status
between is "2-way". So what conclusions can you draw from this output? Multiple choice questions).
A. Router R2 is not a DR
B. Router R3 is not a DR, nor is it a BDR
C. There is no full adjacency between router R2 and router R3
D. Router R4 is destined for DR
E. Router R2 is DR or BDR
Correct Answer: ABC
QUESTION 162
The following description of BGP load sharing is wrong with ?( Multiple choice question)

A. The AS_Path properties of the equivalent routes that form load sharing must be different.
B. The destination CIDR blocks are the same, and load sharing can be formed between BGP routes with different sources.
C. If BGP load sharing is implemented , the local device needs to configure the peer next-hop-local command to change the next hop address to its
own address when issuing a route to an IBGP peer group .
D. IBGP routes and EBGP routes that reach the same destination in the public network can form a load sharing
QUESTION 163
If you delete a declared route entry on a BGP router, the BGP routing ring is triggered to send an Update message for route scattering, which carries the
accepted mandatory attribute of the route entry that was discarded.
A. True
B. False
Correct Answer: B
QUESTION 164
The following statement about OSPF route filtering is incorrect.( Single choice questions).
A. In the NSSA area, filtering for external route ingestion and advertisement can be configured on ASBR or ABR
B. Filtering for the three types of LSAs needs to be configured on the ABR across OSPF regions
C. Interface-based filtering of LSAs allows all LSAs in the inbound and outbound directions except grace LSAs
D. Based on the link state database, when calculating routes, the fiter-policy import command is used, which only affects the route addition in the route
table, and has no effect on the OSPF link state database
Correct Answer: C
QUESTION 165
Regarding the Stub region and the Totally Stub region of the OSPF protocol, the following statement is correct (multiple choice)
A. After modifying the original Stub area to a Totally Stub area, the number of LSAs in the LSDB of each router in the region will definitely be reduced
B. ASBR cannot be present in either the Stub zone or the Totally Stub zone
C. When you modify the original Stub area to a Totally Stub region, the number of LSAs propagating within the region will definitely decrease
D. If there are two ABR in the Totally Stub zone, each ABR sends an LS ID of 0000 to the router in the zone LSA
Correct Answer: BD
QUESTION 166
When there are multiple rule rules for ACLs in VRP, which of the following statements is true regarding the order of matching? Single choice questions).

A. By default, matching is based on the principle of "depth first"
B. By default, matching occurs in the order in which the permit is matched first and denim later.
C. By default, matching is made from smallest to largest according to the Rule-ID.
D. There is only one matching order and cannot be modified.
Correct Answer: C
QUESTION 167
Which of the following is incorrect about HTTPS?( Multiple Choice)
A. HTTPS secures access to data by using SSLVPN.
B. If the HTTPS traffic contains a virus, the router cannot detect the virus directly using IPS technology
C. When using HTTPS to access a website, the website cannot be accessed if the user's browser does not recognize the website's digital certificate.
D. HTTPS protocol uses TCP port 443 by default
Correct Answer: C
QUESTION 168
What are the differences between traffic policing and traffic shaping?
A. Traffic shaping is applied in the inlet direction and traffic supervision is applied in the outlet direction
B. For traffic shaping, the router caches excess packets until bandwidth is available again
C. The token bucket algorithm is used for traffic supervision, and the SPD algorithm is used for traffic shaping
D. For traffic policing, the usage of the buffer can be adjusted for traffic exceeding the CIR
E. For traffic shaping, it can be over-CIR Traffic adjustment for the usage of the buffer
Correct Answer: BE
QUESTION 169
The following description of VRRP load sharing is correct?( Multiple choice questions).
A. When configuring priority, make sure that the same router acts as a master in the three VRRP backup groups
B. You can create multiple VRRP backup groups on one interface of a router . The router can act as a master for one VRRP backup group and as a
backup for other VRRP backup groups
C. When you deploy load sharing, hosts in the same LAN are required to configure the IP addresses of different virtual routers as gateway addresses
for missing provinces
D. VRRP load sharing requires at least two virtual routers to provide forwarding services at the same time

Correct Answer: BCD
QUESTION 170
VrRP priority is not configured as O, devices that issue VRRP priority of 0 stop participating in the VRRP backup group, notifying the backup device to
become a laster device as soon as possible without having to wait until the Master_Down_Interval timer times out
A. True
B. False
Correct Answer: A
QUESTION 171
The following statement about EVPN Type5 routing is wrong?( Single choice questions).
A. Type5 routes carry Layer 3 VNI.
B. Type5 routing carries both Layer 2 VWI and Layer 3 VNI
C. The IP Prefix field can carry both host and network segment addresses.
D. Type5 is an IP prefix route.
Correct Answer: B
QUESTION 172
XLAN uses BGP EVPN to establish a tunnel, what type of message is used? ( Single choice questions).
A. Typel
B. Type2
C. Type3
D. Type4E. Type5
Correct Answer: C
QUESTION 173
Which levels are common in the OSI reference model and the ICP/IP model? ( Multiple choice question)
A. Session layer
B. Data link layer
C. Transmission layer
D. Presentation Layer
E. Physical Layer

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