Download AKTU B-Tech 6th Sem 2017-2018 NCS 601 Computer Networks Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 6th Semester (Sixth Semester) 2017-2018 NCS 601 Computer Networks Question Paper

Printed pages: 02 Sub Code: NCS 601
PaperId: ROHNOII I I I I I I I I I I
B. TECH
(SEM? VI) THEORY EXAMINATION 2017-18
COMPUTER NETWORKS
T ime: 3 Hours T 0tal Marks: 100
Note: 1. Attempt all Sections. If require any missing data; then choose suitably.
SECTION A
1. Attempt all questions in brief. 2 x10 = 20
What are the applications of Computer Networks?
List the advantages and disadvantages of ring topology.
What is count?to?infinity problem?
Given the IP address 1802521172 and the subnet mask 2552551920, what is the
subnet address?
What is piggybacking?
Measurement of slotted ALOHA channel with infinite number of users show
that the 10 percent of slots are idle.
(i) What is the channel toad?
(ii) What is the throughput?
g. Provide few reasons for congestion in a network.
h. How does transport layer perform duplication control?
1. If a binary signal is sent over a 3KHZ channel. Whose signal to noise ratio is 20db.
What is the maximum achievable data rate?
j. Mention the use of HTTP.
999?.?
rm
SECTION B
2. Attempt any three of the following: 10 x 3 = 30
a. Explain network topological design with necessary diagram and brief the
advantagesand disadvantages of various topologies.
b. Discuss the issues in the data link layer and about its protocol on the basis of
layeringprinciple.
c. What is congestion? Brie?y describe the techniques that prevent congestion.
(1. Enumerate on TCP header and working of TCP and differentiate TCP and UDP
withframe format.
e. Elaborate about TELNET and its working procedure.
SECTION C
3. Attempt any one part of the following: 10 x 1 = 10
(a) What is 081 Model? Explain the functions; protocols and services of each
layer?
(b) Discuss the different physical layer transmission media.

4.
(a)
(b)
(a)
(b)
(a)
(b)
(a)
(b)
Attempt any one part of the following: 10 x 1 = 10
Discuss different carrier sense protocols. How are they different than collisions
protocols?
Write short notes on following:
1. Stop and Wait ARQ
ii. Sliding Window Protocol
iii. Go Back N ARQ
Attempt any one part of the following: 10 x 1 = 10
What is IP addressing? How it is classified? How is subnet addressing is
performed?
What is unicast routing? Discuss unicast routing protocols.
Attempt any one part of the following: 10 x 1 = 10
Enumerate how the transport layer unsure that the complete message arrives at
the destination and in the proper order.
Explain the three way handshaking protocol to establish the transport level
connection.
Attempt any one part of the following: 10 x 1 = 10
Write short notes on any two of the following:
1. DNS in the internet
ii. Voice Over IP
iii. File Transfer Protocol
Explain the SNMP protocols in detail.