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Assignment No. 1

Semester: Spring 2015

Data Communication - CS601


Total Marks: 12


Due Date: 25/05/2015




To have the understanding of signals and their encoding schemes.


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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


Final Answer




Final Answer




  1. 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 router


Final Answer




Final Answer





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











Wish You All The Best



Views: 5590


Replies to This Discussion


Here 7 routers are given which are connected with a mesh topology, you have to find how many links they are connected through?


and if you add one more router in the current mesh, how many links now you have to add?

use this formula:

no. of links= n(n-1)/2

where n = number of nodes

let us solve one as an example:
suppose we have 5 routers in a mesh and we have to find the number of links:

no. links= n(n-1)/2

= 5(5-1)/2 = 10 links


Ab to smajh aa gaya hoga.. if not, all of us should discuss more..

oh thanks mjhe samjh lag gaye 

yaar ye jo assignemnt hai complete nai aa rhi

i understand the formula but i dont understand before and after in question... please someone send me clear ans for that...


i think yeh assignment kisi ko b nae ati

please share how to calculate cost and hint answers plz

there are 7 routers are given which is connected with mesh toplogy so 


the no of links=7(7-1)/2 =21


the no of links=8(8-1)/2=28 kindlyyy tell me is it correct??


links = 21

before hn yeh

thn wire is equal 5 meter

and each wire cost is equal 100



wire cost h 500

agr hum aik router bhi lgy to 28 links ho gy

r ap wire pr link wire link ko devide krn thn ans a jy ga

cost find krny ki smjh nai ai

dost dekho

500 total h before b r aftr b


to 21 links hn



This is the right solution..

In this way both parts should be done..

21 kaha se agaya yaha pr ... g


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