GATE CSE 2015 Set 2 | Network Layer Question 20 | Computer Networks

GATE CSE 2015 Set 2

MCQ (Single Correct Answer)

-0.6

Consider the following routing table at an IP router: GATE CSE 2015 Set 2 Computer Networks - Network Layer Question 17 English 1

For each IP address in Group I identify the correct choice of the next hop from Group II using the entries from the routing table above.

GATE CSE 2015 Set 2 Computer Networks - Network Layer Question 17 English 2

i - a, ii - c, iii - e, iv - d

i - a, ii - d, iii - b, iv - e

i - b, ii - c, iii - d, iv - e

i - b, ii - c, iii - e, iv - d

GATE CSE 2014 Set 3

Numerical

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An IP router implementing Classless Inter-domain Routing (CIDR) receives a packet with address 131.23.151.76. The router’s routing table has the following entries: GATE CSE 2014 Set 3 Computer Networks - Network Layer Question 22 English

GATE CSE 2014 Set 3 Computer Networks - Network Layer Question 22 English

The identifier of the output interface on which this packet will be forwarded is ______.

Your input ____

GATE CSE 2014 Set 3

MCQ (Single Correct Answer)

-0.6

An IP router with a Maximum Transmission Unit (MTU) of 1500 bytes has received an IP packet of size 4404 bytes with an IP header of length 20 bytes. The values of the relevant fields in the header of the third IP fragment generated by the router for this packet are

MF bit: 0, Datagram Length: 1444; Offset: 370

MF bit: 1, Datagram Length: 1424; Offset: 185

MF bit: 1, Datagram Length: 1500; Offset: 370

MF bit: 0, Datagram Length: 1424; Offset: 2960

GATE CSE 2014 Set 3

Numerical

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Every host in an IPv4 network has a 1-second resolution real-time clock with battery backup. Each host needs to generate up to 1000 unique identifiers per second. Assume that each host has a globally unique IPv4 address. Design a 50-bit globally unique ID for this purpose. After what period (in seconds) will the identifiers generated by a host wrap around?

Your input ____