CBSE 2026 · Central · Set 4 · Q28 · 2 marks
List one advantage and one disadvantage of Bus topology.What is protocol in the context of computer networks? Which protocol is used to transmit hypertext across the web?
List one advantage and one disadvantage of Bus topology.
What is protocol in the context of computer networks? Which protocol is used to transmit hypertext across the web?
Marking-scheme solution
(a)
Advantages :
● Cost-effective: As it requires less cable.
● Easy to install
● Easy to extend for small networks.
Disadvantages :
● Failure of the main backbone brings down the entire network.
● Fault isolation is difficult.
● Not suitable for large networks
● Data collisions are frequent when many devices are connected.
● Network speed slows down with heavy traffic.
● Security is low as all devices can access transmitted data.
(b)
A protocol is a set of rules that need to be followed by the communicating devices in order to have successful and reliable data communication.
The protocol used to transmit hypertext across the web isHypertext Transfer Protocol (HTTP)
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CBSE Class 12 Computer Science past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.