Question 1

What is the primary function of a Layer 2 switch in a network?

Accepted Answer

A Layer 2 switch forwards frames based on MAC addresses, using a MAC address table to make forwarding decisions within the same network segment.

Question 2

What distinguishes a router from a Layer 2 switch?

Accepted Answer

A router operates at Layer 3 and forwards packets between different networks using IP addresses and routing tables, while a Layer 2 switch only forwards frames within the same network using MAC addresses.

Question 3

What is the purpose of a content-addressable memory (CAM) table in a switch?

Accepted Answer

A CAM table (MAC address table) maps MAC addresses to specific switch ports, allowing the switch to forward frames only to the port where the destination device resides rather than flooding all ports.

Question 4

What happens when a switch receives a frame destined for a MAC address not in its CAM table?

Accepted Answer

The switch floods the frame out all ports except the port it was received on, a process called unknown unicast flooding, until the destination MAC address is learned.

Question 5

What is the role of a wireless access point (WAP) in a network infrastructure?

Accepted Answer

A WAP provides wireless clients with access to the wired network by bridging 802.11 wireless signals to the Ethernet infrastructure, acting as a central connection point for wireless devices.

Network+ Network Infrastructure

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