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Computer Networks
Concepts of Layering
Marks 1Marks 2
Data Link Layer and Switching
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Network Layer
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Application Layer Protocol
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Routing Algorithm
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TCP UDP Sockets and Congestion Control
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Lan Technologies and Wi-Fi
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Network Security
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1
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
2
GATE CSE 2007
MCQ (Single Correct Answer)
+1
-0.3
Consider the following two statements:

i. A hash function (these are often used for computing digital signatures) is an injective function.
ii. encryption technique such as DES performs a permutation on the elements of its input alphabet.

Which one of the following options is valid for the above two statements?
A
Both are false
B
Statement (i) is true and the other is false
C
Statement (ii) is true and the other is false
D
Both are true
3
GATE CSE 2007
MCQ (Single Correct Answer)
+1
-0.3
The minimum positive integer p such that (3p modulo 17) = 1 is
A
5
B
8
C
12
D
16
4
GATE CSE 2007
MCQ (Single Correct Answer)
+1
-0.3
Exponentiation is a heavily used operation in public key cryptography. Which of the following options is the tightest upper bound on the number of multiplications required to compute (bn mod m),$$0 \le b,n \le m$$?
A
$${\rm O}\left( {\log n} \right)$$
B
$${\rm O}\left( {\sqrt n } \right)$$
C
$${\rm O}\left( {{n \over {\log n}}} \right)$$
D
$${\rm O}\left( n \right)$$
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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