BeHappy Corporation has set up its new centre at Noida, Uttar Pradesh for its office and web-based activities. It has 4 blocks of buildings.



Distance between the various blocks is as follows:

A to B 

40 m 

B to C 


C to D 


A to D 


B to D 


A to C 


Numbers of computers in each block

Block A


Block B


Block C


Block D


(a) Suggest and draw the cable layout to efficiently connect various blocks of buildings within the Noida centre for connecting the digital devices. 


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(b) Suggest the placement of the following device with justification 

  1. Repeater 

  2. Hub/Switch 


  1. i) Repeater : between C and D as the distance between them is 100 mts , which is the longest among all the other connections.
  1. ii) Hub/ Switch : In each block as they help to share data packets within the devices of the network in each block 

(c) Which kind of network (PAN/LAN/WAN) will be formed if the Noida office is connected to its head office in Mumbai? 


WAN , since Wide Area Network (WAN) connects computers and other LANs and MANs , which are spread across different geographical locations of a country or in different countries or continents .


(d) Which fast and very effective wireless transmission medium should preferably be used to connect the head office at Mumbai with the centre at Noida?



Satellite is a microwave relay system which relays the radio signal transmitted from ground station . Satellites accept signals transmitted from earth stations , amplify them , and return them to another earth station .


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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.