Consider the following layout and answer the questions given below:

Question 4 (i)

Which of the following topology is shown in the above layout?

(A) Star

(B) Ring

(C) Bus

(D) Mesh

Answer:

Checking the options

(A) Star - In star topology, each communicating device is connected to a central node , which is a networking device like a hub or a switch .

(B) Ring - In ring topology, each node is connected to two other devices, one each on either side.

(C) Bus - In this networking topology , all the nodes are connected to a single transmission medium.

(D) Mesh - In this networking topology, each communicating device is connected with every other device in the network

In the givenl ayout, there is a thick cable which runs through the centre and all the other nodes are connected to it. So the layout is a bus topology.

So, the correct answer is (C)

Question 4 (ii)

Which of the following is not true about Bus topology?

(A) Connects peripherals or computers in a linear fashion.

(B) Easy to connect or remove devices in this network

(C) Very cost-effective

(D) Data-transfer speed is very high

Answer:

• In bus topology , each communicating device connects to a transmission medium, known as bus. 
• Data sent from a node are passed on to the bus and are transmitted through the length of the bus in both directions. That means, data can be received by any of the nodes connected to the bus. 
• The data-transfer speed of bus topology is very low as compared  to other topologies since transmission from any node has to travel the length of the bus to reach all the stations. 
• In this topology, a single backbone wire called bus is shared among the nodes, which makes it cheaper and easier to connect or remove devices.

Checking the options

• (A) Connects peripherals or computers in a linear  fashion - This is true.
• (B) Easy to connect or remove devices in this network  - This is true.
• (C) Very cost-effective  - This is true.
• (D) Data-transfer speed is very high - This is false.

So, the correct answer is (D)

Question 4 (iii)

Which of the following cannot be connected using Bus Topology?

(A) School Computer lab

(B) Offices in two separate buildings

(C) Two floors of an office

(D) All of these

Answer:

Bus Topology is used to connect devices over small areas. 

Checking the options

• (A) School Computer lab - It can be connected using bus topology because it is spread over only a small area.
• (B) Offices in two separate buildings - It cannot be connected using bus topology because it is spread over a large area.
• (C) Two floors of an office  - It can be connected using bus topology because it is spread over a small area.
• (D) All of these 

Since, offices in two separate buildings cannot be connected using bus topology.

So, the correct answer is (B)

Question 4 (iv)

Which of the following medium is best suited to create bus topology?

(A) Twisted pair

(B) Coaxial cable

(C) Fiber optic

(D) Telephone lines

Answer:

Checking the options

• (A) Twisted pair - used in star and ring topology
• (B) Coaxial cable - used in bus topology  
• (C) Fiber optic - used in star and ring topology  
• (D) Telephone lines 

Bus Topology uses coaxial cables for connection because they are highly durable and easy to install.

So, the correct answer is (B)

Question 4 (v)

Bus Topology is also called as _____

(A) Circular topology

(B) Linear topology

(C) Ring topology

(D) Hybrid topology

Answer:

From the image, it is clear that bus Topology connects peripherals or computers in a linear manner.

Checking the options

• (A) Circular topology - This is false  
• (B) Linear topology - This is true
• (C) Ring topology - This is false   
• (D) Hybrid topology - This is false   

So, the correct answer is (B)