A switch has just been powered on. PC1 connects to port 1; PC2 connects to port 2. If PC1 sends data to PC2, how will the switch process the frame?

A switch has just been powered on. PC1 connects to port 1; PC2 connects to port 2. If PC1 sends data to PC2, how will the switch process the frame?

• The switch forwards the frame based on the MAC address of PC2.
• The switch adds the MAC address of PC1 (that is received on the ingress port) to the switch MAC address table.
• The switch forwards the frame to all switch ports including ports 1 and 2.
• The switch adds the IP address of PC2 (that is sent through the egress port) to the switch MAC address table.

Explanation: When a switch is first powered on, it has no entries in the MAC address table. A switch adds to the MAC address table by examining the Layer 2 header source MAC address. If the MAC address is not already in the switch MAC address table, the switch adds it. The switch forwards the frame based on the destination MAC address found in the Layer 2 header. If the destination MAC address is not in the MAC address table, the switch forwards the data to all ports that have devices attached except for the ingress port through which the switch received the frame.

Exam with this question: CCNA 2 v5 Chapter 1: Check Your Understanding Questions