Assignment No. 1Semester: Spring 2015

Data Communication - CS601Name: Ali Rehman

Registration # mc150201333

Total Marks: 12

Due Date: 25/05/2015

Objective:

To have the understanding of signals and their encoding schemes.

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Assignment

Consider a computer network of a social networking web site in which 7 routers are connected with each other using a dedicated wired point to point link. Each link is of 5 meters and cost of wire is 100 PKR per meter.

In view of the above scenario answer the following questions and provide yours to-the-point answers in respective tables.

1. What will be the total number of links before and after adding this new router?

No. of Links before adding new router No. of Links after adding new router

Calculation Final AnswerNo of Routers=7

No of links = n(n-1)/2=7(7-1)/2=7(6)/2=42/2=21

No of links =21Calculation Final Answer

No of routers =8No of links = n(n-1)/2

=8(8-1)/2=8(7)/2=56/2=28

No of links =28

2. What will be the total cost of wire before adding this new router and after adding this router?

Total cost of wire before adding new router Total cost of wire after adding new routerCalculation Final Answer

No of links = 21Wire require for each

link = 5 metersWire require for 21

links = 21*5=105 meters

Cost of 1 meter =Rs 100

Cost of 105 meters = 100*105

= Rs10500

Total Cost = Rs10500Calculation Final Answer

No of links = 28Wire require for each

link = 5 metersWire require for 28

links = 28*5=140 meters

Cost of 1 meter =Rs 100

Cost of 105 meters = 100*140

= Rs14000

Total Cost = Rs14000

Note: Give you solution with all relevant calculations in given tables.

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