On which type of device is every port in the same collision domain?
A . a router
B . a Layer 2 switch
C . a hub
D . switch
E . a Layer 3 switch
Answer: C
Explanation:
Collision domain 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.