Role of L2 Switch

Question 1

A layer two switch forwards the frame through the network, based on what?

Answer 1

The destination MAC address is in the Layer 2 header.

Question 2

How does a layer two switch discover which MAC addresses are reachable off its local ports?

Answer 2

By listening to incoming frames and looking at the source MAC address.

Question 3

What would a host/computer do to discover the Layer 2 MAC address of its IPv4 default gateway?

Answer 3

It uses ARP

Question 4

What causes the MAC address table to be populated or updated on a layer two switch?

Answer 4

The client sends an ARP request
The client sends a DNS request
The client sends an HTTP request
The client pings another device

Question 5

Which devices build MAC address tables by looking at the Layer 2 source address in frames?

Answer 5

A Generic Layer 2 Switch
A Cisco Layer 2 Switch

Question 6

What command clears all dynamically learned MAC addresses on a Cisco switch?

Answer 6

clear mac address-table dynamic