Solution of CS601 Assignment No 1 2019 Data Communications

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Question-1  Suppose ElecTech is a multinational electronics company which has branches in different countries. Recently it has decided to open its new branch in Pakistan. In the new branch, the company wants to deploy computer networks for its different departments each having 13 computers. Following are key requirements for deploying the computer networks: 

1. Finance department wants to use fast speed and highly secure network without involving any intermediate device in place.

2. HR department wants to use centrally managed network.

3. Admin department requires connecting all computers in a linear fashion.

4. Finance, HR and Admin departments want to connect their networks with each other in such a way that the data transmission among these departments should be carried through some Token passing mechanism. 

Considering the above mentioned scenario and requirements, you are required to fill the following table by mentioning the most suitable topology and number of links required against each requirement:

RequirementsMost Suitable TopologyRequirements Most Suitable Topology No. of links required1234

Solution:

Reference See the Page 31-34 (please check it yourself)

Links Calculation formula n(n-1)/2 

N = number of computers connected on the network

RequirementsMost Suitable TopologyRequirements Most Suitable Topology No. of links required1Ring TopologyCalculate by yourself by above given formula2Star Topology---3Bus Topology-----4Tree Topology----

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Question-2  Following table contains some communication scenarios. You are required to mention the suitable Transmission mode against each scenario:

Solution

Reference See the Page 31-34 

Links Calculation formula n(n-1)/2 

N = number of computers connected on the network

Communication ScenariosTransmission ModeAli is talking to his friend on video call over Skype.Full Duplex ModeAslam is typing a letter through Keyboard.Simplex ModeAhmad is listing news on radio.Simplex ModeCaptain is communicating with soldier using walkie-talkie.Half Duplex Mode