GATE CSE Network Layer – Computer Networks Practice Test

GATE CSE Network Layer – Computer Networks Practice Test | Set 1

Questions 21-25 of 100

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Question 21

MCQ · Single Correct 2 mark

A router has the following CIDR routes in its routing table:
172.16.0.0/12 -> Interface A
172.16.0.0/16 -> Interface B
172.16.32.0/20 -> Interface C
0.0.0.0/0 -> Interface D
Where will a packet with destination IP 172.16.40.1 be forwarded?

A Interface B B Interface A C Interface C D Interface D

Question 22

MCQ · Single Correct 1 mark

What is the IPv6 address length in bits?

A 64 bits B 48 bits C 32 bits D 128 bits

Question 23

MCQ · Single Correct 2 mark

In Network Address Translation (NAT / NAPT), how does a router allow multiple internal hosts to share a single public IPv4 address?

A By operating as a proxy at the Application layer B By assigning static MAC addresses to all internal hosts C By mapping distinct internal (Private IP, Port) pairs to the single (Public IP, Assigned Port) D By splitting IP headers into 128-bit blocks

Question 24

MCQ · Single Correct 1 mark

A router performs longest-prefix matching on routes 10.0.0.0/8, 10.1.0.0/16, and 10.1.2.0/24. Which route is selected for destination 10.1.2.37?

A 10.1.0.0/16 B Default route C 10.0.0.0/8 D 10.1.2.0/24

Question 25

MCQ · Single Correct 1 mark

For the IPv4 address 192.168.1.130/25, what is the network address?

A 192.168.1.128 B 192.168.1.0 C 192.168.1.255 D 192.168.1.127