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2. QUESTION: 40
Which three components are included in the Cisco IOS XR infrastructure? (Choose
three.)
A. modular line cards
B. shelf controllers
C. route processors
D. service processors
E. distributed service cards
Answer: B, C, D
Explanation:
1.4. SP high end product 1.4.01. IOS-XR structure Distributed Infrastructure
The kernel is replicated across the router infrastructure. The services and client
applications can be distributed across the router infrastructure. The infrastructure includes
route processors (RPs), distributed route processors (DRPs), service processors (SPs),
shelf controllers (SCs), modular service cards (MSCs), and line cards (LCs).
QUESTION: 41
Which statement about multicast VPN is true?
A. The MDT group address should be the same for both address families in the same
VRF.
B. The MDT group address should be the same for both address families in the different
VRFs.
C. Configuration of the MDT source on a pre-VRF basis is supported only on IPv6.
D. The MDT group address should be different for both address families in the same
VRF.
Answer: A
3. Explanation:
Restrictions for Multicast VPN for Multicast Routing
• Configuration of the MDT source on a per-VRF basis is only supported on IPv4. • The
MDT group address should be the same for both the address families in the same VRF.
Default-MDTs must have the same group address for all VRFs
that comprise a MVPN.
Data-MDTs may have the same group address if PIM-SSM is used. If PIM-SM is used,
they must have a different group address, as providing the same one could result in the
PE router receiving unwanted traffic. This is a PIM-SM protocol issue, not an
implementation issue.
QUESTION: 42
Which three statements about the route target (RT) are true? (Choose three.)
A. The RT is a BGP extended community.
B. The RT is an 8-byte field that is prefixed to an IPv4 address to make it a unique
VPNv4 address.
C. When a VPN route that is learned from a CE router is injected into BGP, one or more
RTs are associated with it
D. The distribution of VPN routing information is controlled through the use of VPN RTs
E. When a VPN route that is learned from a CE router is injected into BGP, there is
always one RT that is associated with it.
Answer: A, C, D
QUESTION: 43
What is the port number of the IPsec Encapsulating Security Payload packet?
A. UDP port 50
B. IP protocol 51
C. TCP port 51
D. TCP port 50
E. IP protocol 50
F. UDP port51
Answer: E
4. Explanation:
6.2. Managed Security services traversing the core
AH operates directly on top of IP, using IP protocol number 51. ESP operates directly on
top of IP, using IP protocol number 50.
QUESTION: 44
Which statement about VPLS is true?
A. All CE devices emulate a bridge
B. All provider devices emulate a bridge
C. Hierarchical VPLS reduces signaling overhead
D. Each PE device emulates a bridge
E. Each CE device emulates a bridge
Answer: C
Explanation:
A hierarchical model can be used to improve the scalability characteristics of VPLS.
Hierarchical VPLS (HVPLS) reduces signaling overhead and packet replication
requirements for the provider edge.
QUESTION: 45
Which three statements about the secure domain router are true? (Choose three.)
A. The logical router can span across chassis.
B. The fabric and system controller module are shared by all logical routers.
C. Each logical router has a distinct fabric and system controller module
D. The logical router can share a route processor
E. The logical router cannot share a route processor.
Answer: A, B, E
Explanation:
1.4. SP high end product
1.4.04. Secure domain router (SDR)
5. QUESTION: 46
In Ethernet Aggregation application which option is needed when the U-PE connects to
an N-PE and broadband remote access servers?
A. Ethernet Multipoint Service (EMS)
B. VPLS
C. E1
D. Wire Service
Answer: A
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