CS601 Assignment No. 1 solution

Assignment No. 01 

SEMESTER Spring 2011   

CS601- Data Communication   

Total Marks: 15   

Due Date: 18/04/2011   

Instructions 

Please read the following instructions carefully before solving & submitting assignment:   

It should be clear that your assignment will not get any credit (zero marks) if:   

• The assignment is submitted after due date.  

• The submitted assignment does not open or file corrupt.  

• The assignment is copied (from other student or ditto copy from handouts or internet). 

• Student ID is not mentioned in the assignment File or name of file is other than student ID.    

For any query about the assignment, contact at cs601@vu.edu.pk   Marks: 20  

Question 1:                  [5] 

For six devices in a network, what is the number of cable links required for a mesh, ring, and star and bus topology?   

Question 2:      [5] 

Draw a hybrid topology with a ring backbone connecting two bus backbones each bus backbone connecting three star networks.   

Question 3: [5]

Suppose we want to build a small network in school building, which topology you will prefer and why? Explain your answer with solid reasons.        

Lectures Covered: This assignment covers Lecture # 01-08    

Deadline: 

Your assignment must be uploaded/submitted till Monday 18 April, 2011.  

Solution:

Answer Question#1

Mesh Topology = 30 Cables
Ring Topology = 6 Cables
Star Topology = 5 Cables
Bus Topology = 7 Cables

Mesh Topology
n=6
n(n-1)

Star topology contain of 7 devices. 7th hub device.. but in this question, just asked for 6 devices, so for 6 devices 5 cables..

Bus topology have 6 links but cables are 7, 7th cable straight.

Question 3: [5]
Suppose we want to build a small network in school building, which topology you will prefer and why? Explain your answer with solid reasons.

Answer: For school network we will prefer the Star topology because it is efficient and fast. Lets see why we are preferring this topology in our school.

Explanation:
1. Easy to install
2. Easy to maintain as compare to other topologies
3. If we want to install a system it will take only 1 minute
4. Not costly as compare to other topologies
5. If a system is down our network will not diatribe as compare to bus and star topologies.