200-301 · Question #351
What does a switch use to build its MAC address table?
The correct answer is D. ingress traffic. LAN switches determine how to handle incoming data frames by maintaining the MAC address table. A switch builds its MAC address table by recording the MAC address of each device connected to each of its ports. The switch uses the information in the MAC address table to send frame
Question
What does a switch use to build its MAC address table?
Options
- AVTP
- BDTP
- Cegress traffic
- Dingress traffic
How the community answered
(23 responses)- A9% (2)
- B4% (1)
- D87% (20)
Explanation
LAN switches determine how to handle incoming data frames by maintaining the MAC address table. A switch builds its MAC address table by recording the MAC address of each device connected to each of its ports. The switch uses the information in the MAC address table to send frames destined for a specific device out the port, which has been assigned to that device. An easy way to remember how a switch operates is the following saying: A switch learns on “source” and forwards based on “destination.” This means that a switch populates the MAC address table based on source MAC addresses. As frames enter the switch, the switch “learns” the source MAC address of the received frame and adds the MAC address to the MAC address table or refreshes the age timer of an existing MAC address table entry.
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