# CS610 Assignment 1 Solution Spring 2021 - Data Communication Assignment

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CS610 ASSIGNMENT 1 SOLUTION SPRING 2021

Question No 1:

Using a proper probing tool on Command Line Interface (CLI) in your computer/laptop, obtain the route information of www.vu.edu.pk up to 3 hops. Take the complete screenshot containing the related command and the result. Paste the screenshot as your solution in an MS Word file.

Solution:

Input Command: TRACERT -h 5

www.vu.edu.pk

ScreenShot: Question No 2:

1. Suppose in a shared network of five computers, a 15 MB file is transferred by a computer without breaking down into packets across the network with 56Kpbs capacity. You are required to calculate the time in minutes that it will take to transfer this file.

Solution:

Formula: File Size / Transfer Rate

Transfer Rate 56kbps

File Size= 15MB

15MB=15*1000Byte=15,000Byte

15000Byte*8Bit =1,20,000Bits

Time= 1,20,000 / 56 =2142.8sec

In Minutes:

2142.8* 60 = 35.7 minutes

You need to write all necessary formula(s) and calculation steps to give your answer.

1. Now, if the same file is broken into 2000 bytes packets, then you are required to calculate the time in seconds that other computers must wait for before the beginning of data transfer.

You need to write all necessary formula(s) and calculation steps to give your answer.

Solution:

Formula:

Time: File Size / Transfer Rate

Transfer Rate= 56kbps

Size= 2000 Bytes

Time= 2000*8 / 56 = 285.71 sec

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