Computer Networks
Concepts of Layering
Marks 1Marks 2
Data Link Layer and Switching
Marks 1Marks 2
Network Layer
Marks 1Marks 2
Application Layer Protocol
Marks 1Marks 2
Routing Algorithm
Marks 1Marks 2
TCP UDP Sockets and Congestion Control
Marks 1Marks 2
Lan Technologies and Wi-Fi
Marks 1Marks 2
Network Security
Marks 1Marks 2
1
GATE CSE 2015 Set 2
MCQ (Single Correct Answer)
+2
-0.6
Host A sends a UDP datagram containing 8880 bytes of user data to host B over an Ethernet LAN. Ethernet frames may carry data up to 1500 bytes (i.e. MTU = 1500 bytes). Size of UDP header is 8 bytes and size of IP heard is 20 bytes.There is no option field in IP header How many total number of IP fragments will be transmitted and what will be the contents of offset field in the last fragment?
A
6 and 925
B
6 and 7400
C
7 and 1110
D
7 and 8880
2
GATE CSE 2015 Set 2
MCQ (Single Correct Answer)
+2
-0.6
Consider the following routing table at an IP router: GATE CSE 2015 Set 2 Computer Networks - Network Layer Question 20 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 20 English 2
A
i - a, ii - c, iii - e, iv - d
B
i - a, ii - d, iii - b, iv - e
C
i - b, ii - c, iii - d, iv - e
D
i - b, ii - c, iii - e, iv - d
3
GATE CSE 2014 Set 3
Numerical
+2
-0
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 ____
4
GATE CSE 2014 Set 3
MCQ (Single Correct Answer)
+2
-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
A
MF bit: 0, Datagram Length: 1444; Offset: 370
B
MF bit: 1, Datagram Length: 1424; Offset: 185
C
MF bit: 1, Datagram Length: 1500; Offset: 370
D
MF bit: 0, Datagram Length: 1424; Offset: 2960
GATE CSE Subjects
Theory of Computation
Operating Systems
Algorithms
Digital Logic
Database Management System
Data Structures
Computer Networks
Software Engineering
Compiler Design
Web Technologies
General Aptitude
Discrete Mathematics
Programming Languages
Computer Organization