In a switched network, what is the effect of enabling full-duplex operation on a link?

• A. Increases collisions on the link.
• B. Eliminating collisions on the connected link.
• C. Has no impact on collisions.
• D. Turns collisions into broadcasts.

Answer: (B)

Enabling full-duplex on a switch link creates a dedicated, bidirectional channel between the two devices, so there’s no shared medium where multiple devices contend to send. Because the link is point-to-point and there’s no competing transmitter on the same wire, collisions can’t occur. CSMA/CD isn’t used in full-duplex, so the concept of a collision goes away on that link.

The other descriptions don’t fit: a full-duplex link doesn’t increase collisions, and it doesn’t leave collisions unchanged. Collisions aren’t turned into broadcasts; they’re simply eliminated because there’s no shared medium to cause them.