Computer Sciences > GATE 2014 SET-2 > Network Security
An IP machine Q has a path to another IP machine H via three IP routers R1, R2, and R3.
Q-R1-R2-R3-H
H acts as an HTTP server, and Q connects to H via HTTP and downloads a file. Session layer encryption is used, with DES as the shared key encryption protocol. Consider the following four pieces of information:
[I1] The URL of the file downloaded by Q
[I2] The TCP port numbers at Q and H
[I3] The IP addresses of Q and H
[I4] The link layer addresses of Q and H
Which of I1, I2, I3, and I4 can an intruder learn through sniffing at R2 alone?
A
Only I1 and I2
B
Only I1
C
Only I2 and I3
D
Only I3 and I4

Correct : c

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Related Topics

GATE CS 2014 Set-2 Q39 network sniffing R2 IP addresses TCP ports session layer encryption link layer addresses HTTP server communication network security GATE data link layer information

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