CBSE Class 12 Computer Science HOTs Communication and Networking

1 King Soft Organization has set up its new center at Mumbai for its office and web based activities. It has 4 blocks of buildings as shown in the diagram below.

a) Suggest a cable layout of connections between the blocks.

b) Suggest the most suitable place(i.e.block ) to house the server of this organization with a suitable reason.

c) Suggest the placement of the following devices with justification.

a. Repeater

b. Hub/Switch

d) The organization is planning to link its front office situated in the city in a

e) Hilly region where cable connection is not feasible, suggest an economic way to connect it with reasonably high speed.

2 Knowledge supplement Organization has set up its new center at Mangalore for its office and web based activities. It has 4 Blocks of buildings as shown in the diagram below:

i. Suggest a most suitable cable layout of connections between the Blocks.

ii. Suggest the most suitable places (i.e. Block) to house the server of this organization with a suitable reason.

iii. Suggest the placement of the following devices with justification:

a. Repeater b. Hub/Switch

The organization is planning to link its head office situated in City in a hilly region where cable connection is not feasible, suggest an economic way to connect it with reasonably high speed?

3 TKM Centenary public school in Kollam is setting up the network between its different wings. There are four wings named as Seniors (S), Kids (K), Juniors (J) and Hostel (H). Distance between various buildings is given below:

(i) Suggest a valid topology for networking the computer of all wings

(ii) Name the wing where the server to be installed. Justify your answer.

(iii)Suggest the placement of Hub or Switch in the network.

(iv) Suggest a most suitable cable layout of connections between the wings.

3 JCT Industries has set up its new center at Chohal for its office and web based activities. The company compound has 4 blocks as shown in the diagram below:

Center to center distances between various blocks is as follows:

Block A to Block B 50 m

Block B to Block C 130 m

Block C to Block D 70 m

Block A to Block D 180 m

Block B to Block D 160 m

Block A to Block C 80 m

Number of Computers in each of the blocks is as follows:

Block A 30

Block B 60

Block C 135

Block D 15

1) Suggest a cable layout of connections between the blocks.

2) Suggest the most suitable place (i.e.block) to house the server of this company with a suitable reason.

3) Suggest the placement of the following devices with justification:

(i)Repeater

(ii) Switch/Hub

4) Mention the economic technology to provide internet accessibility to all blocks.

4 ABC Organization has set up its new center at Gurgaon for its office and web based activities. It has 4 blocks of buildings as shown in the diagram below.

The distances between the building are as :

Block A to Block C- 120 meters

Block A to Block B- 20 meters

Block A to Block D- 550 meters

Block B to Block D- 80 meters

Block D to Block C- 110 meters

Block B to Block C- 280 meters

The number of computers in each Block are as follows:

Block A - 120

Block B - 180

Block C - 20

Block D - 110

(i) Suggest a cable layout of connections between the blocks and type of cable.

(ii) Suggest the most suitable place (i.e. block) to house the server of this organization with a suitable reason.

(iii) Suggest the placement of the following devices with justification.

1. Repeater

2. Hub/Switch

The organization is planning to link its front office situated in the city in a Hilly region where cable connection is not feasible, suggest an economic way to connect it with reasonably high speed.

5 Indian Industries has the following four buildings in Chennai. Distance between various wings is given below:

i. Suggest suitable CABLE LAYOUTS FOR THESE BUILDINGS.

ii. Name the wing where the Server is to be installed. Justify your answer.

iii. Suggest the placement of Hub/Switch in the network.

iv. Mention an economic technology to provide Internet accessibility to all wings.

6 Hindustan Connecting World Association” is planning to start their offices in four major cities in India to provide regional IT infrastructure support in the field of Education & Culture. The company has planned to set up their head office in New Delhi in three locations and have named their New Delhi offices as “Sales Office”, “Head Office” and “Tech Office”. The company’s regional offices are located at “Coimbatore”, “Kolkata” and “Ahmedabad”. A rough layout of the same is as follows:

Approximate distances between these offices as per network survey team is as follows:

Place From         Place To               Distance

Head Office      Sales Office             10 KM

Head Office       Tech Office               70 Meter

Head Office       Kolkata Office        1291 KM

Head Office    Ahmedabad Office      790 KM

Head Office   Coimbatore Office      1952 KM

In continuation of the above, the company experts have planned to install the following number of computers in each of their offices:

Head Office           100

Sales Office            20

Tech Office             50

Kolkata Office         50

Ahmedabad Office   50

Coimbatore Office    50

(i) Suggest network type (out of LAN, MAN, WAN) for connecting each of the following set of their offices:

- Head Office and Tech Office

- Head Office and Coimbatore Office

(ii) Which device will you suggest to be procured by the company for connecting all the computers within each of their offices out of the following devices?

- Modem

- Telephone

- Switch/ Hub

(iii) Which of the following communication media, will you suggest to be procured by the company for connecting their local offices in New Delhi for ver effective and fast communication?

- Ethernet Cable

- Optical Fiber

- Telephone Cable

(iv) Suggest a cable/ wiring layout for connecting the company’s local offices located in New Delhi. Also, suggest an effective method/ technology for connecting the company’s regional offices at “Kolkata”, “Coimbatore” and “Ahmedabad”.