Which device is used to handle carrier detection and collision detection in LANs ?

a.
Bridge

b.
Transreceiver

c.
None of the options

d.
Repeater

b. Transreceiver.

b. Transreceiver

The correct answer is b. Transceiver. A transceiver is a device used in Local Area Networks (LANs) to handle carrier detection and collision detection.

To arrive at this answer, you can eliminate options a, c, and d by understanding the functionalities of those devices:

a. Bridge: A bridge is a device used to connect two LAN networks or segments. It doesn't directly handle carrier detection or collision detection.

c. None of the options: This option implies that none of the devices mentioned in the given list handle carrier detection or collision detection, which is not correct.

d. Repeater: A repeater is a device used to amplify or regenerate network signals. It doesn't handle carrier detection or collision detection either.

Therefore, the only device left is b. Transceiver, which is responsible for detecting whether a carrier signal is present on the network, as well as detecting collisions that may occur when multiple devices attempt to transmit data simultaneously on the network.