CS601 Assignment 1 Solution and Discussion

[zareen]

Assignment No. 01
Semester: Fall 2019
CS601: Data Communication Total Marks: 20

Due Date: 14/11/2019

Instructions:
Please read the following instructions carefully before submitting assignment:
You need to use MS word document to prepare and submit the assignment on VU-LMS.
It should be clear that your assignment will not get any credit if:

 The assignment is submitted after due date.
 The assignment is not in the required format (doc or docx)
 The submitted assignment does not open or file is corrupt.
 Assignment is copied (partial or full) from any source (websites, forums, students, etc)

Objectives:

The objective of this assignment is to enhance the learning capabilities of the students about:
 Types of Networks
 Network Topologies
 OSI model layers

Assignment

Question No. 1

Suppose a university has two computer network sections named as “Admin” and “Faculty”. Admin section is comprised of 13 computers which are directly connected with each other to provide efficient communication among computers whereas the “Faculty” section contains 20 computers which are connected through an intelligent central device. To attend an online conference being held in another country, the network administrator has established an online video link in the faculty section. The conference chair has sent an image of conference agenda to the network administrator for sharing with all faculty members.

Considering the above-mentioned scenario, you are required to:

a) Identify the type of network topology used in the Admin section.
b) Write the number of links required for the identified topology for Admin section. (You need to write all steps of calculation).
c) Write the total number of ports required for identified topology for Admin section?
d) Identify the type of network, linking computer of faculty section with the computer of conference chair through video conference.
e) Identify the type of network topology used in computer network of Faculty section.
f) Mention the name of intelligent device used for connecting computers of Faculty Section.
g) Calculate the maximum number of different colors that can be represented, if the image sent by conference chair is a colored image using 24-bits to represent a single pixel. (You are required to perform all steps of calculation).
Question No. 2

Following table contains some layers of OSI mode along with some information associated with each layer. However, the information given in column B is not matching with column A. You are required to carefully analyze both the columns and write correct information associated with each layer in column C:

A	B	C
Network Layer	Data Segments
Data link	Encryption
Physical Layer	Internet Browser
Transport Layer	Router
Application Layer	Physical Addressing
Presentation Layer	Network Media

Best of Luck!

[zareen]

Q. 1 Answer:
Considering the above-mentioned scenario, you are required to:

a) Identify the type of network topology used in the Admin section.
Answer:
As all computers are directly connected with each other, so, there will be MESH topology.
b) Write the number of links required for the identified topology for Admin section. (You need to write all steps of calculation).
Answer:
As the identified topology is Mesh, so, to find the number of required links, we use the following formula:
N*(N-1)/2 where N = Total Nodes i.e. 13
Now, put the values in the formula:
= 13(13-1)/2
=13(12)/2
=78

c) Write the total number of ports required for identified topology for Admin section?
Answer:
To find the number of ports in a Mesh topology, we use the following formula:
N-1 where N is the total number of nodes in the network i.e.13
By putting the value in the formula, we get:
13-1 =12
d) Identify the type of network, linking computer of faculty section with the computer of conference chair through video conference.
Answer:
In the given scenario, two computers are connected which are located in two different countries. The resulting network will be a Wide Area Network that covers large geographical area like countries and sub continents.
e) Identify the type of network topology used in computer network of Faculty section.
Answer:
As per given scenario, computers of Faculty section are connected with each other by involving a central device. So, it will be a Star topology.
f) Mention the name of intelligent device used for connecting computers of Faculty Section.
Answer:
A Switch will be used as an intelligent device.
g) Calculate the maximum number of different colors that can be represented, if the image sent by conference chair is a colored image using 24-bits to represent a single pixel. (You are required to perform all steps of calculation).
Answer:
To find the maximum number of different colors, following formula is used:
2n

Where n is total number of bits i.e.24

Now, put the value in the formula:
224= 16.77 million (16777216)

Q. 2 Answer:

A	B	C
Network Layer	Data Segments	Router
Data link	Encryption	Physical Addressing
Physical Layer	Internet Browser	Network Media
Transport Layer	Router	Data Segments
Application Layer	Physical Addressing	Internet Browser
Presentation Layer	Network Media	Encryption

[zareen]

https://www.youtube.com/watch?v=m8J1qZF-Jr0