Consider the following statements: (i) Address Resolution Protocol (ARP) provides a mapping from an IP address to the corresponding hardware (link-layer) address. (ii) A single TCP segment from a sender S to a receiver R cannot carry both data from S to R and acknowledgement for a segment from R to S. Which ONE of the following is CORRECT?

Single correct

Source: GATE CSE 2025 Set 2 (CS2), IIT Roorkee. Official question paper.

GATE CSE 2019 | Question 54

Other / Removed from syllabus

NAT2 marks

In an RSA cryptosystem, the value of the public modulus parameter

n

is 3007. If it is also known that

\varphi(n) = 2880

, where

\varphi()

denotes Euler's Totient Function, then the prime factor of

n

which is greater than 50 is _____.

Numerical answer

Your answer

Source: GATE CSE 2019, IIT Madras. Official question paper and answer key.

GATE CSE 2017 | Set 1 | Question 15

Other / Removed from syllabus

MCQ1 mark

A sender S sends a message

m

to receiver R, which is digitally signed by S with its private key. In this scenario, one or more of the following security violations can take place. (I) S can launch a birthday attack to replace

m

with a fraudulent message. (II) A third party attacker can launch a birthday attack to replace

m

with a fraudulent message. (III) R can launch a birthday attack to replace

m

with a fraudulent message. Which of the following are possible security violations?

Single correct

Answer key coming soon

Source: GATE CSE 2017 Set 1, IIT Roorkee. Official question paper.

GATE CSE 2017 | Set 1 | Question 44

Other / Removed from syllabus

NAT2 marks

In a RSA cryptosystem, a participant A uses two prime numbers

p = 13

and

q = 17

to generate her public and private keys. If the public key of A is 35, then the private key of A is ________.

Numerical answer

Your answer

Answer key coming soon

Source: GATE CSE 2017 Set 1, IIT Roorkee. Official question paper.

GATE CSE 2016 | Set 1 | Question 52

Other / Removed from syllabus

MCQ2 marks

Consider that B wants to send a message

m

that is digitally signed to A. Let the pair of private and public keys for A and B be denoted by

K_x^-

and

K_x^+

for

x = A, B

, respectively. Let

K_x(m)

represent the operation of encrypting

m

with a key

K_x

and

H(m)

represent the message digest. Which one of the following indicates the CORRECT way of sending the message

m

along with the digital signature to A?

Single correct

Answer key coming soon

Source: GATE CSE 2016 Set 1, IISc Bengaluru. Official question paper.

GATE CSE 2016 | Set 2 | Question 23

Other / Removed from syllabus

MCQ1 mark

Anarkali digitally signs a message and sends it to Salim. Verification of the signature by Salim requires

Single correct

Answer key coming soon

Source: GATE CSE 2016 Set 2, IISc Bengaluru. Official question paper.

GATE CSE 2015 | Set 1 | Question 24

Other / Removed from syllabus

MCQ1 mark

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

Single correct

Source: GATE CSE 2015 Set 1, IIT Kanpur. Official question paper and answer key.

GATE CSE 2015 | Set 1 | Question 25

Other / Removed from syllabus

MCQ1 mark

Which of the following statements is/are FALSE? I. XML overcomes the limitations in HTML to support a structured way of organizing content. II. XML specification is not case sensitive while HTML specification is case sensitive. III. XML supports user defined tags while HTML uses pre-defined tags. IV. XML tags need not be closed while HTML tags must be closed.

Single correct

Source: GATE CSE 2015 Set 1, IIT Kanpur. Official question paper and answer key.

GATE CSE 2015 | Set 3 | Question 18

Other / Removed from syllabus

MCQ1 mark

In a web server, ten WebPages are stored with the URLs of the form http://www.yourname.com/var.html; where, var is a different number from 1 to 10 for each Webpage. Suppose, the client stores the Webpage with var = 1 (say W1) in local machine, edits and then tests. Rest of the WebPages remains on the web server. W1 contains several relative URLs of the form "var.html" referring to the other WebPages. Which one of the following statements needs to be added in W1, so that all the relative URLs in W1 refer to the appropriate WebPages on the web server?

Single correct

Source: GATE CSE 2015 Set 3, IIT Kanpur. Official question paper and answer key.

GATE CSE 2014 | Set 1 | Question 24

Other / Removed from syllabus

MCQ1 mark

Which of the following are used to generate a message digest by the network security protocols? (P) RSA (Q) SHA-1 (R) DES (S) MD5

Single correct

Source: GATE CSE 2014 Set 1, IIT Kharagpur. Official question paper and answer key.

GATE CSE 2013 | Question 11

Other / Removed from syllabus

MCQ1 mark

Match the problem domains in GROUP I with the solution technologies in GROUP II.

\begin{array}{ll} \textbf{GROUP I} & \textbf{GROUP II} \\ \text{(P) Service oriented computing} & \text{(1) Interoperability} \\ \text{(Q) Heterogeneous communicating systems} & \text{(2) BPMN} \\ \text{(R) Information representation} & \text{(3) Publish-find-bind} \\ \text{(S) Process description} & \text{(4) XML} \end{array}

Single correct

Answer key coming soon

Source: GATE CSE 2013, IIT Bombay. Official question paper (booklet code A).

GATE CSE 2013 | Question 13

Other / Removed from syllabus

MCQ1 mark

Using public key cryptography, X adds a digital signature

\sigma

to message M, encrypts

\langle M, \sigma \rangle

, and sends it to Y, where it is decrypted. Which one of the following sequences of keys is used for the operations?

Single correct

Answer key coming soon

Source: GATE CSE 2013, IIT Bombay. Official question paper (booklet code A).

GATE CSE 2012 | Question 44

Other / Removed from syllabus

MCQ2 marks

Consider a source computer (S) transmitting a file of size

10^6

bits to a destination computer (D) over a network of two routers (

R_1

and

R_2

) and three links (

L_1

L_2

, and

L_3

L_1

connects S to

R_1

;

L_2

connects

R_1

R_2

; and

L_3

connects

R_2

to D. Let each link be of length 100 km. Assume signals travel over each link at a speed of

10^8

meters per second. Assume that the link bandwidth on each link is 1Mbps. Let the file be broken down into 1000 packets each of size 1000 bits. Find the total sum of transmission and propagation delays in transmitting the file from S to D?

Single correct

Answer key coming soon

Source: GATE CSE 2012. Official question paper (booklet code A).

GATE CSE 2011 | Question 2

Other / Removed from syllabus

MCQ1 mark

A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOT

Single correct

Answer key coming soon

Source: GATE CSE 2011, IIT Madras. Official question paper.

GATE CSE 2011 | Question 9

Other / Removed from syllabus

MCQ1 mark

HTML (HyperText Markup Language) has language elements which permit certain actions other than describing the structure of the web document. Which one of the following actions is NOT supported by pure HTML (without any server or client side scripting) pages?

Single correct

Answer key coming soon

Source: GATE CSE 2011, IIT Madras. Official question paper.

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