How many collision domains & broadcast domains exist in a 24-port switch with 4 VLANs applied ?

4 broadcast domain and 24 collision domain.

collision domain 24 and broadcast domain 6.

A collision domain is, as the name implies, a part of a network where packet collisions can occur. A collision occurs when two devices send a packet at the same time on the shared network segment. The packets collide and both devices must send the packets again, which reduces network efficiency. Collisions are often in a hub environment, because each port on a hub is in the same collision domain. By contrast, each port on a bridge, a switch or a router is in a separate collision domain.

collision 24 and broad cost 4.