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Gujarat Technological UniversitySummer 2026 Examination

GTU 3150710 Computer Networks (CN) Summer 2026 Paper Solution & PDF

B.E. · Computer Engineering · Semester 5 · Subject Code: 3150710
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Total Marks70 MarksExternal theory exam
Passing Marks23 Marks33% minimum cutoff
Exam Duration2.5 Hours2:30 PM – 5:00 PM
Paper Structure5 QuestionsWith internal OR choices
Jump toQ1Q2Q3Q4Q5

Question 1

14 MarksMedium
(a)
What is client-server architecture? List its applications on the Internet.
3 Marks
(b)
Illustrate the working of the SMTP protocol with a simple example.
4 Marks
(c)
Explain the OSI model in detail and compare it with the TCP/IP model.
7 Marks

Question 2

14 MarksMedium
(a)
Define network topology. Explain star topology in detail.
3 Marks
(b)
How TCP estimates RTT (Round Trip Time)?
4 Marks
(c)
Explain the formats of HTTP request and HTTP response messages.
7 Marks
OR OPTION
(c)
Explain various services provided by DNS.
7 Marks

Question 3

14 MarksMedium
(a)
Describe Hierarchical Routing.
3 Marks
(b)
Differentiate network edge and network core.
4 Marks
(c)
Explain Parity Checks and CRC with simple examples.
7 Marks
OR OPTION
(a)
Describe the internal hardware structure of a router.
3 Marks
(b)

Differentiate nodal processing delay, queuing delay, transmission delay and propagation delay.

4 Marks
(c)
Explain CSMA/CD protocol.
7 Marks

Question 4

14 MarksMedium
(a)
What is fragmentation in IP? Explain briefly.
3 Marks
(b)
What is Slotted ALOHA? How it differs from Pure ALOHA?
4 Marks
(c)
Explain how TCP handles flow control and congestion control.
7 Marks
OR OPTION
(a)
What is hop count? Explain its role in routing.
3 Marks
(b)
What is VLAN? Explain its advantages and working.
4 Marks
(c)
Explain the concept of multiplexing and demultiplexing by TCP in detail.
7 Marks

Question 5

14 MarksMedium
(a)
RIP is Intra-AS Routing protocol in the Internet. True or False? Justify your answer.
3 Marks
(b)
Discuss the applications of UDP.
4 Marks
(c)
Write a short note on IP addressing and forwarding.
7 Marks
OR OPTION
(a)

In Datagram Networks, packets sent from one end system to another may follow different paths through the network and may arrive out of order. True or False? Justify your answer.

3 Marks
(b)
Discuss three-way handshaking process in TCP.
4 Marks
(c)
Write a short note on Broadcast and Multicast routing.
7 Marks
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About this Examination Paper & Attribution

Official Gujarat Technological University (GTU) examination paper and step-by-step solutions for Computer Networks (CN) (Summer 2026, B.E. · Computer Engineering, Sem 5). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

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