1
GATE CSE 2015 Set 3
Numerical
+2
-0
In the network 200.20.11.144/27, the fourth octet (in decimal) of the last IP address of the network which can be assigned to a host is ________.
2
GATE CSE 2015 Set 2
+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
3
GATE CSE 2015 Set 2
+2
-0.6
Consider the following routing table at an IP router: 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. 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
4
GATE CSE 2014 Set 2
+2
-0.6
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 $$[I4]$$
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
EXAM MAP
Joint Entrance Examination