Chapter 11: Data Communication — Online MCQ Test
COMPUTER SCIENCE · Grade 12 · CBSE(NCERT)
Practice Chapter 11: Data Communication with a free chapter-wise online MCQ test.
This chapter covers: network topologies - star topology - bus topology - tree topology - transmission media - twisted pair - optical fiber - radio waves - hubs - switches - routers - gateways.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 11: Data Communication — Important Questions & Answers
Which term refers to the physical or logical arrangement of computers and other devices in a network?
- A. Network protocol
- B. Network topology
- C. Transmission medium
- D. Network address
Answer: B. Network topology
Network topology describes how devices are arranged and connected in a network.
Network topology describes how devices are arranged and connected in a network.
In a star topology, all nodes are connected to a central device such as a ________.
- A. Terminator
- B. Hub or switch
- C. Printer
- D. Modem only
Answer: B. Hub or switch
In star topology, each node is directly connected to a central hub or switch.
In star topology, each node is directly connected to a central hub or switch.
In a star topology, what happens if the central hub or switch fails?
- A. Only one computer is affected
- B. The entire network may stop working
- C. The network automatically becomes a bus topology
- D. Data transmission becomes faster
Answer: B. The entire network may stop working
Since all nodes depend on the central device in star topology, failure of that device can bring down the whole network.
Since all nodes depend on the central device in star topology, failure of that device can bring down the whole network.
In a star topology, if the cable connecting one computer to the central switch breaks, what is the most likely effect?
- A. Only that computer gets disconnected
- B. All computers stop communicating
- C. The network becomes a bus topology
- D. The switch becomes a router
Answer: A. Only that computer gets disconnected
In star topology, each node has an independent link to the central device, so a single link failure usually affects only that node.
In star topology, each node has an independent link to the central device, so a single link failure usually affects only that node.
Which situation most clearly requires a gateway rather than only a router?
- A. Connecting two devices in the same star LAN
- B. Connecting two networks that use different communication protocols
- C. Connecting a computer to a switch using twisted pair cable
- D. Broadcasting a signal from a hub to all connected computers
Answer: B. Connecting two networks that use different communication protocols
A gateway is required when communication involves dissimilar networks or different protocols, because it can perform protocol conversion.
A gateway is required when communication involves dissimilar networks or different protocols, because it can perform protocol conversion.