Network Tech Topic 5- MAC Mechanics

What does a Layer 2 Ethernet switch use to make forwarding decisions?

• Frame types

• Layer 2 MAC addresses

• Layer 3 IP addresses

• Port numbers

What happens if a switch does not find the destination MAC address in its MAC address table?

• It forwards the frame to the specified port

• It discards the frame

• It forwards the frame out of all ports except the incoming port

• It sends an error message

How long does a typical Ethernet switch keep an entry in its MAC address table?

• 10 minutes

• 5 minutes

• 1 minute

• 30 minutes

What is the purpose of examining the source MAC address of a frame?

• To determine the frame type

• To learn new MAC addresses for the table

• To check for errors in the frame

• To identify the destination device

What is the term used for a MAC address table in some contexts?

• Address Resolution Protocol (ARP) table

• Content Addressable Memory (CAM) table

• Routing table

• Forwarding table

In half-duplex communication, what is true about data transmission?

• It requires more bandwidth

• Devices can transmit and receive simultaneously

• Only one device can send or receive at a time

• Data transmission is always faster

What does CSMA/CD stand for?

• Carrier Sense Multiple Access with Collision Detection

• Carrier Signal Multiple Access with Collision Detection

• Contention Signal Multiple Access with Collision Detection

• Carrier Sense Media Access with Collision Detection

What is the main function of a switch's MAC address table?

• To store IP addresses

• To filter and forward frames

• To log network activity

• To manage network traffic

What happens when a collision occurs in a CSMA/CD network?

• The devices will stop transmitting

• The data is sent again immediately

• The network resets

• The data is corrupted and needs to be resent

What is the primary difference between half-duplex and full-duplex communication?

• Half-duplex allows simultaneous transmission

• Full-duplex allows simultaneous transmission

• Full-duplex is less efficient

• Half-duplex is faster than full-duplex