Question

What address type does a switch use to make selective forwarding decisions?

a. IP address
b. MAC address
c. Subnet address
d. DNS address

Answer 1

A switch uses MAC addresses to make selective forwarding decisions. It operates at the data link layer of the OSI model and uses the unique MAC address of network interface cards to send frames within a local network.

Step-by-step explanation:

A switch is a network device that connects devices together on a computer network, using packet switching to receive, process, and forward data to the destination device. A switch operates at the data link layer (Layer 2) of the OSI model. The selective forwarding decisions are based on MAC addresses (Media Access Control addresses). Each network interface card (NIC) has a unique MAC address which is used by the switch to send frames to the correct destination on the local network. Unlike routers that use IP addresses to route packets across different networks, switches use MAC addresses to keep track of devices on the same network segment.