Module 2 Flashcards
What is the full form of CAM in networking?
Content Addressable Memory
CAM is used to store the MAC address table.
What does the MAC address table do?
It helps the switch forward frames on the LAN by mapping MAC addresses to their corresponding ports.
What is store-and-forward switching?
A method where the switch receives the entire frame and checks its validity before forwarding.
What is cut-through switching?
A method that forwards the frame immediately after determining the destination MAC address.
What are the characteristics of the fragment free method?
Checks the destination and ensures that the frame is at least 64 Bytes to eliminate runts.
When is cut-through switching appropriate?
When latency needs to be under 10 microseconds.
True or False: Cut-through switching checks the Frame Check Sequence (FCS).
False
It does not check the FCS, which can propagate errors.
What happens to collision domains when full duplex is used?
Collision domains are eliminated.
What is a broadcast domain?
The area across all Layer 1 or Layer 2 devices on a LAN that can receive broadcast traffic.
What device breaks a broadcast domain?
A Layer 3 device (router).
How do switches alleviate network congestion?
By using the MAC address table and full-duplex technology.
This helps eliminate collisions and improves bandwidth.
Name two features of switches that help alleviate congestion.
- Fast Port Speeds
- High Port Density
What is the role of the ingress interface in frame forwarding?
It is the entry port for frames.
What happens if a destination MAC is not in the MAC address table?
The switch floods the frame out all interfaces except the one it was received on.
What does the switch learn during the frame forwarding process?
The source MAC address and the port it was received on.
What does the term egress refer to in networking?
Exiting the interface.
Fill in the blank: A switch will never allow traffic to be forwarded out the interface it _______.
received the traffic.
What are the two primary characteristics of store-and-forward switching?
- Error Checking
- Buffering
What is the purpose of the Frame Check Sequence (FCS)?
To check for CRC errors in the frame.
What do switches use to make forwarding decisions?
Software on application-specific-integrated circuits (ASICs).
What is the significance of a large frame buffer in a switch?
It allows for temporary storage while processing large quantities of frames.
