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1
GATE CSE 2015 Set 1
MCQ (Single Correct Answer)
+1
-0.3
Which one of the following fields of an IP header is NOT modified by a typical IP router?
A
Checksum
B
Source address
C
Time to Live (TTL)
D
Length
2
GATE CSE 2014 Set 3
MCQ (Single Correct Answer)
+1
-0.3
Host A (on TCP/IPv4 network A) sends an IP datagram D to host B (also on TCP/IPv4 network B). Assume that no error occurred during the transmission of D. When D reaches B, which of the following IP header field(s) may be different from that of the original datagram D?

(i) TTL
(ii) Checksum
(iii) Fragment Offset
A
(i) only
B
(i) and (ii) only
C
(ii) and (iii) only
D
(i), (ii) and (iii)
3
GATE CSE 2012
MCQ (Single Correct Answer)
+1
-0.3
In the IPv4 addressing format, the number of networks allowed under Class C addresses is
A
214
B
27
C
221
D
224
4
GATE CSE 2010
MCQ (Single Correct Answer)
+1
-0.3
One of the header fields in an IP datagram is the Time to Live (TTL) field. Which of the following statements best explains the need for this field?
A
It can be used to prioritize packets
B
It can be used to reduce delays
C
It can be used to optimize throughput
D
It can be used to prevent packet looping
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GATE CSE Subjects
Theory of Computation
Finite Automata and Regular Language Push Down Automata and Context Free Language Undecidability Recursively Enumerable Language and Turing Machine
Operating Systems
Process Concepts and Cpu Scheduling Synchronization and Concurrency Deadlocks Memory Management File System IO and Protection
Algorithms
Complexity Analysis and Asymptotic Notations Searching and Sorting Divide and Conquer Method Greedy Method P and NP Concepts Dynamic Programming
Digital Logic
Number Systems Boolean Algebra K Maps Combinational Circuits Sequential Circuits
Database Management System
Er Diagrams Functional Dependencies and Normalization Structured Query Language Relational Algebra Transactions and Concurrency File Structures and Indexing
Data Structures
Arrays Stacks and Queues Linked List Trees Graphs Hashing
Computer Networks
Concepts of Layering Data Link Layer and Switching Network Layer Application Layer Protocol Routing Algorithm TCP UDP Sockets and Congestion Control Lan Technologies and Wi-Fi Network Security
Software Engineering
Software Engineering
Compiler Design
Lexical Analysis Parsing Syntax Directed Translation Code Generation and Optimization
Web Technologies
Web Technologies
General Aptitude
Verbal Ability Logical Reasoning Numerical Ability
Discrete Mathematics
Set Theory & Algebra Linear Algebra Graph Theory Combinatorics Mathematical Logic Probability Calculus
Programming Languages
Basic of Programming Language Function and Recursion Pointer and Structure in C
Computer Organization
Computer Arithmetic Pipelining Machine Instructions and Addressing Modes Memory Interfacing IO Interface Alu Data Path and Control Unit Secondary Memory
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