Which statement describes the effect of a switch on collision domains?

• A. Switches Break Up Collision Domains.
• B. Switches Propagate Collisions Across All Ports.
• C. Switches Create New Collision Domains.
• D. Switches Have No Impact On Collisions.

Answer: (A)

Collision domains are the parts of a network where devices compete for access to the same shared medium. A switch changes that by providing a separate path per port; each port connects to only one device (or another switch) and, on that link, there is its own collision domain. Because of this, data frames traveling from one port to another do not collide with frames on other ports, and in modern networks, collisions are often avoided altogether due to full-duplex operation. So the switch breaks up a single collision domain into multiple, smaller collision domains—one per port. This is why describing switches as breaking up collision domains is the best way to capture their effect.