This document contains 51 questions about networking topics such as IP addressing, routing protocols, MPLS, VLANs, QoS, and more. It tests knowledge of concepts like how data is sent over the internet, classful and classless addressing, routing table information, tunneling protocols, reasons for NAT, functions of DHCP, multicast addressing, routing protocol metrics and path selection, MAC address learning in switches, avoiding loops in layer 2, signaling protocols, ping operation, label imposition in MPLS, VLAN stacking, Diffserv traffic classes, link state routing advantages, router types, and actions when TTL reaches 0. Additional review of OSPF, IGP vs EGP, priority queuing and rate limiting is recommended

1. 1. How the Host-A sends data to Host-B on the internet?
2. Which of the following is the class C address?
- Class C address (192 to 223)
3. Which of the following represents the correct one for
2001:AEDF:0000:0056:0000:BEDA:CDAB:ABCD/64?
- 2001:AEDF:0:56/64
4. RIB having which information?
- it will have all possible routes for known destination (similar to this)
5. FF02::2 represents what?
- all routers in local segments in IPv6 environment
6. What is the function of DHCP?
− it provides ip address to host on the same network
− it provides DNS server ip details also along with IP
7. which two tunneling protocols are used to connect IPV6 island over an IPV4 network
Options : (two options)
1) GRE
2) 6to4
3) 4to6
4) PPP
8. What are two reasons why a network operator would choose to use Network Address Translation
(NAT)
Options: (Choose two)
1) By using NAT,troubleshooting is easier
2) NAT adds an extra security layer between the host and other networks.
3) The IPV6 address space is running out
4) The IPV4 address space is running out
9. Why we use NAT?
- use to convert private to public address and save public IP address
10. How can we correlate Multicast IP address with Multicast Ethernet frame?
- it use last 23 bits from 32 bit multicast IP.
11. What does the DF bits denotes in IP Header?
- Do not Fragment
12. Which of the following are true about TCP & UDP?
Options :
TCP use internet web browse ;
UDP use internet web browse ;
Voip use UDP ;
SNMP use tcp ;
13. Which UDP port will SNMP use? ( Options : 23, 53, 161, 80)
14. What are the requirements for becoming a multicast receiver?
- host need to be part of multicast group
15. What is the range of addresses that Multicast source use?
- class a,b,c
16. Identify the Private IP according to the RFC 1918? (Options : 172.16.1.0/9 ; 10.254.0.0/24)
17. For which purpose we will use EXP bits in MPLS header?
-Qos function
18. What is the function of P router?
Options:

2. 1)pull
2)swap
3)PHP
4)drop
19. How the SPF will select paths in a network?
-based on cost of the link
20. Select the best path for R1 to R7 using SPF?
21.which prefix will be selected from the routing table for 10.10.100.50 ?
prefix next hop
10.10.100.0/24 10.10.100.1
10.10.100.50/32 10.10.100.1
0.0.0.0 10.10.100.1
22. Which of the following are true about IGP & EGP?
23. Select the IGP from the following?
24. Diff serv supports how many types of Traffic classes?
-64
25. What is the true about PQ?
26. What is the true about stacking of C-VLAN & S-VLAN?
27. What is the true about LSP?
-unidirection path from source to destination in MPLS
28. Consider a network is configured with Static, ISIS & BGP with their default Administrative
distance value. Routers will follow which protocol?
-Static
29. Which of the following Layer-2 devices learns MAC addresses & able to forward unicast traffic
between 2 hosts?
- Bridge & switch
30. Which of the following will be used for avoiding loops in Layer-2 network?
-STP
31. Which of the following protocol is used for transport signaling in PSTN?
Options :
1) UDP
2) TCP
3) SCTP
32. What is the true about PING test?
Options (choose 2)
1)to trouble ip connectivity problem ,
2)it used echo reply & request
3)increment ttl values by 1 from starting 0
33. In MPLS frame-mode,where is the label Imposed ?
Options:
1. between Layer1 and Layer 2 headers
2. only in the VCI field
3. in the VPI/VCI field
4. between Layer 2 and Layer 3 headers

3. 34.what is true about vlan stacking
35.what does in end to end diffserv
36.advantage of link state protocol
37.combine link state routing protocol with internet ..something like that.
38.FF02::1 represents what?
Options:
1) all routers in local segment
2) all nodes in local segment
39.which multicast address will be used to send multicast message to group of receiver
40.which statement is true about multicast IP address
Options:
1) To successfully send and receive multicast data, the sender and receiver must use the same
multicast ethernet address
2) to receive multicast data, the receiver must have a multicast IP address assigned to its interface.
3) Multicate IP addresses are not assigned to any physical interface on a router
4) To Successfully send and receive multicast data, the sender and receiver must have the same
multicast IP addresses assigned to their interface
41.which subnetmask used for loopback interface
Option
1) 255.0.0.0
2) 255.255.255.255
3) 255.255.0.0
4) 255.255.255.0
42.this question is related Qos
M |---/-----------------/-----------------------
b | / /
p | / /
s |/ /
|-----------------/------------------------------ msec
Options :
1) shaping,
2) rate-limited,
3) queuing,
4) classification)
43.Which two statements are true about TCP
Options: (Choose two)
TCP ensures an encrypted communication
TCP ensures the arrival date of the packet
TCP ensures a reliable communication
TCP controls the througput of a session

4. 44.what is the theoretical maximum number of Diffserv classes that are available to classify traffic
Options:
1) 16
2) 32
3) 64
4) 8
45.Select classless routing protocol from the following
Options: (Choose two)
RIPv1
OSPF
ISIS
IPv4
46. From Which criteria does OSPF calculate the optimal path for given remote network
Options:
1.shortest path based on cost of the links
2.the number of the routers on the path
3.the money spent to send the traffic
4.the time needed to forward the packet to the destination
47. which MAC address is known as the broadcast MAC address ?
Options:
1.0XFFFFFFFF
2.0xBROADCAST
3.255.255.255.255
4.FF:FF:FF:FF:FF:FF
48. which two statements regarding VLAN stacking are correct ?
Options:(Choose two)
1.The C-VLAN tag is placed on top of the S-VLAN tag
2.The S-VLAN tag is placed on top of the C-VLAN tag
3.The S-VLAN tag is placed after source MAC address
4.the S-VLAN tag is placed before the destination MAC address
49.which of the following is true about IP/MPLS ?
Options: (Choose two)
labels selected from LIB placed in LFIB
routes selected from RIB placed in FIB
labels selected from FIB placed in LIB
routes selected from FIB placed in RIB
50. which protocol is used in network monitor for link failure

5. Options
1) TCP
2) UDP
3) SNMP
4) IGMP
51.if router receive a packet with TTL value 0, then what it will do ?
Options:
1) Router look the routing table and forward
2) router will drop the packet
Note:
Apart from this there are question from following topics.
OSPF (try to understand how ospf working along with internet)
IGP Vs EGP ( read more internal about this)
Qos - Priority Queue (read in depth on this topic), rate limiting

6. Options
1) TCP
2) UDP
3) SNMP
4) IGMP
51.if router receive a packet with TTL value 0, then what it will do ?
Options:
1) Router look the routing table and forward
2) router will drop the packet
Note:
Apart from this there are question from following topics.
OSPF (try to understand how ospf working along with internet)
IGP Vs EGP ( read more internal about this)
Qos - Priority Queue (read in depth on this topic), rate limiting