Printed Page: 1 of 2

Subject Code: KCS603

0Roll No: 0 0 0 0 0 0 0 0 0 0 0 0 0

BTECH
(SEM VI) THEORY EXAMINATION 2021-22
COMPUTER NETWORKS

Time: 3 Hours Total Marks: 100

Note: Attempt all Sections. If you require any missing data, then choose suitably.

SECTION A

1. Attempt all questions in brief. 2*10 = 20

Qno Questions CO
(a) Discuss about transmission mediums in networking. 1
(b) What do you understand by network topologies. 1
(c) Explain transmission delay in flow control. 2
(d) Write a note on round trip time (RTT) in networking. 2
(e) Discuss the role logical addressing. 3
(f) Define datagrams in switching. 3
(g) Discuss about the IP ranges of Class A, B, C and D. 4
(h) List out prime three functionality of transport layer. 4
(i) Explain the use of RST flag in TCP header. 5
90

1
(j) Explain HTTP. 5

13
_2

2.
P1

SECTION B

24
2E

2. Attempt any three of the following: 10*3 = 30

5.
.5
P2

Qno Questions CO
17
(a) Discuss encoding types in physical layer of ISO-OSI model. 2
Q

(b) Discuss each command in detail used in networking:

|1

a- ipconfig
8

b- netstat
1

2
c- ping
9:

d- hostname
:2

e‐ tracert
13

(c) List out and discuss the disadvantages in STOP N WAIT protocol. 3
2

(d) Calculate the total number of transmissions that are required to send
3
02

10 data packets through GBN-3 and every 5th packet is lost.

(e) Discuss in detail about ICMP role in network layer.
-2

4
06

SECTION C
0-
|2

3. Attempt any one part of the following: 10*1 = 10

Qno Questions CO
(a) Define the relationship between transmission delay and propagation
2
delay, if the efficiency is at least 50% in STOP N WAIT protocol.
(b) Find out window size and minimum sequence number in sliding
window protocol, if Transmission delay (Tt)= 1 ms, Propagation delay 2
(Tp)= 24.5 ms. (ms= milliseconds).

QP22EP1_290 | 20-06-2022 13:29:18 | 117.55.242.131

 Printed Page: 2 of 2
Subject Code: KCS603
0Roll No: 0 0 0 0 0 0 0 0 0 0 0 0 0

BTECH
(SEM VI) THEORY EXAMINATION 2021-22
COMPUTER NETWORKS

4. Attempt any one part of the following: 10 *1 = 10

Qno Questions CO
(a) Explain distance vector routing (DVR) with working example in detail. 3
3
(b) Sender’s data D=11010, CRC generator polynomial= x +x+1. Apply
CRC algorithm and perform calculations both at sender and receiver 3
end.

5. Attempt any one part of the following: 10*1 = 10

Qno Questions CO
(a) Assume we want to send a data from S to R and there are 2 routers in
between. What will be the total time taken if total number of packets
are 5. Data is like:
2
Tp=0 ms, Data size=1000 bytes, BW=1 mbps, Header of the
packet=100 bytes.
(b) Explain CSMA/CD in detail. 2
90

1
13
_2

6. Attempt any one part of the following: 10*1 = 10

2.
P1

24
Qno Questions CO
2E

(a) Divide the network with IP address 200.1.2.0 into 5 subnets. 4

5.
(b) Describe the role of application layer and session layer of OSI model
.5
P2

4
in detail.
17
Q

|1

7. Attempt any one part of the following: 10*1 = 10

8

Qno Questions CO
1
9:

(a) Write detailed note on “TCP vs UDP”. 5

:2

(b) Explain following application layer protocols:

13

 FTP
5
 SMTP
2

 DNS
02
-2
06
0-
|2

QP22EP1_290 | 20-06-2022 13:29:18 | 117.55.242.131

Printed Pages:02 Sub Code:KCS-603
Paper Id: 236895 Roll No.

B.TECH.
(SEM VI) THEORY EXAMINATION 2022-23
COMPUTER NETWORKS
Time: 3 Hours Total Marks: 100
Note: Attempt all Sections. If require any missing data; then choose suitably.

SECTION A

1. Attempt all questions in brief. 2 x 10 = 20

a. Explain the differences between point to point and point to multipoint.

b. Define bit rate and baud rate.
c. Compare OSI with TCP/IP protocol suit.
d. Construct the Polar NRZ-L and NRZ-I schemes for the following Data: 01001110
e. Describe piggybacking?
f. Explain ICMP BGP protocol and its application in real-world scenarios.
90

6
g. If a 7-bit hamming code received as 1110101, show that the code word has error. Also,

22
rectify error in this code.
_2

3.
h. Define QoS.
P1

11
i. State difference between HTTP and HTTPS.
3E

0.
j. Describe the “ count to infinity problem” with an example.

.2
P2

SECTION B 25
Q

|1
2. Attempt any three of the following: 10x3=30
8

a. Name and Explain 4 network devices, and write about transmission Impairment in brief.
:0
53

b. Explain CSMA/CD with CSMA/CA with diagram.

:
08

c. Explain the working principle of the Congestion Control mechanism with a well-labeled
diagram.
3

d. Explain the following terms by taking real-world examples:

02

i) Go Back-N
-2

ii) Selective repeat.

06

e. Explain Asymmetric cryptography. Also, write the steps used in RSA algorithm,
6-

demonstrate the transmission of character “F” using RSA.

|2

SECTION C
3. Attempt any one part of the following: 10x1=10

a. Describe all the layers of the OSI model with a well-labeled diagram.
b. Differentiate between various topologies with well labeled diagram.

QP23EP1_290 | 26-06-2023 08:53:08 | 125.20.113.226

4. Attempt any one part of the following: 10x1=10

a. A bit stream 10011101 is transmitted using x3+1 generator polynomial. Generate the
CRC code word for this message.
b. Explain error control mechanism in Data link layer and giving example of each
method.

5. Attempt any one part of the following: 10x1=10

a. Illustrate the difference between IPv4 and IPv6.

b. The IP network 200.198.160.0 is using subnet mask 255.255.255.224. Draw the
subnets.

6. Attempt any one part of the following: 10x1=10

a. Explain the following terms:

(i) FTP (ii) SMTP (iii) DNS (iv)ARP

b. Differentiate TCP and UDP in context of the header format.

90

6
7. Attempt any one part of the following: 10x1=10

22
_2

3.
a. Explain DNS.
P1

11
b. Define SNMP Protocols and working scenario.
3E

0.
.2
P2

25
Q

|1
8
:0
: 53
08
3
02
-2
06
6-
|2

QP23EP1_290 | 26-06-2023 08:53:08 | 125.20.113.226

 Printed Page: 1 of 1
Subject Code: KCS603
0Roll No: 0 0 0 0 0 0 0 0 0 0 0 0 0

BTECH
(SEM VI) THEORY EXAMINATION 2023-24
COMPUTER NETWORKS
TIME: 3 HRS M.MARKS: 100

Note: 1. Attempt all Sections. If require any missing data; then choose suitably.
SECTION A

1. Attempt all questions in brief. 2 x 10 = 20

a. What are the applications of Computer Networks? 02
b. Write advantages and disadvantages of Mesh Topology. 02
c. Define fixed and variable size framing. 02
d. Explain the working of Bridge. 02
e. Define delivery in Network Layer. 02
f. Define Token Bucket. 02
g. Write about Registered ports. 02
h. Differentiate between connection less and connection oriented. 02
i. What is Telnet? 02
j. Define Compression. 02

2
13
SECTION B
90

2.
2. Attempt any three of the following: 3 x 10 = 30
_2

24
a. Define TCP/IP Model in detail. 10
P1

5.
b. Explain Noisy channel Protocols with explanation and diagram. 10
4E

.5
c. Define IPv4 header Format in detail. 10
17
P2

d. Define TCP features and header in detail. 10

|1
e. Explain SNMP in detail. 10
Q

SECTION C
AM

3. Attempt any one part of the following: 1 x 10 = 10

7

a. Name and explain Network Devices on each layer of OSI Model. 10

:4

b. Define various topologies with diagram, features, and pros-cons. 10

01

4. Attempt any one part of the following: 1 x 10 = 10

9:

a. Define any 5 LAN standards. 10

24

b. Explain all Random-Access protocols. 10

5. Attempt any one part of the following: 1 x 10 = 10
20

a. Explain all Interdomain and Intradomain routings algorithms. 10

n-

3
b. Senders’ data D= 110101, CRC generator polynomial=x +x+1. Apply CRC 10
Ju

algorithm and Perform calculations both at sender and receiver end.

6-

6. Attempt any one part of the following: 1 x 10 = 10

|2

a. Define Connection Management. Explain how Three-way handshaking using 10

diagram.
b. Write about Quality-of-Service Parameters. 10
7. Attempt any one part of the following: 1 x 10 = 10
a. Differentiate between FTP and HTTP. 10
b. Explain Cryptography. Write about RSA Algorithm with example. 10

1|Page
QP24EP1_290 | 26-Jun-2024 9:01:47 AM | 117.55.242.132