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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
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1
GATE CSE 2015 Set 1
MCQ (Single Correct Answer)
+1
-0.3
Suppose that everyone in a group of N people wants to communicate secretly with the N - 1 others using symmetric key cryptographic system. The communication between any two persons should not be decodable by the others in the group. The number of keys required in the system as a whole to satisfy the confidentiality requirement is
A
2N
B
N(N - 1)
C
$${{N(N - 1)} \over 2}$$
D
(N - 1)2
2
GATE CSE 2014 Set 1
MCQ (Single Correct Answer)
+1
-0.3
Which one of the following are used to generate a message digest by the network security protocols?
(P) RSA
(Q) SHA-1
(R) DES
(S) MD5
A
P and R only
B
Q and R only
C
Q and S only
D
R and S only
3
GATE CSE 2013
MCQ (Single Correct Answer)
+1
-0.3
Using public key cryptography, X adds a digital signature σ to message M, encrypts, and sends it to Y, where it is decrypted. Which one of the following sequences of keys is used for the operations?
A
Encryption: X's private key followed by Y's private key;
Decryption: X’s public key followed by Y’s public key
B
Encryption: X's private key followed by Y's public key;
Decryption: X's public key followed by Y's private key
C
Encryption: X's public key followed by Y's private key;
Decryption: Y's public key followed by X's private key
D
Encryption: X's private key followed by Y's public key;
Decryption: Y's private key followed by X's public key
4
GATE CSE 2011
MCQ (Single Correct Answer)
+1
-0.3
A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOT
A
block entire HTTP traffic during 9:00 PM and 5:00 AM
B
block all ICMP traffic
C
stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP address
D
block TCP traffic from a specific user on a multi-user system during 9:00 PM and 5:00 AM
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Questions Asked from Marks 1
GATE CSE 2019 (1) GATE CSE 2017 Set 1 (1) GATE CSE 2016 Set 2 (1) GATE CSE 2015 Set 1 (1) GATE CSE 2014 Set 1 (1) GATE CSE 2013 (1) GATE CSE 2011 (1) GATE CSE 2007 (3) GATE CSE 2004 (1)
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