CSMA-CD

Carrier Sense Multiple access Collision Detection

CSMA-CD

Characteristics of CSMA-CD

• Only one PC can communicate with other PC• They keep sensing the medium• If medium is free and want to communicate with other

pc they will acquire the line.• During communication only Destination PC’s will

respond.• They can use the entire link like democratic• It has source address, destination address and Data.• All PCs will get frame but only destination Add PC will

Accept that frame, others will discard it

MAC

• 00-1A-2B-3C-4D-5E• 6 byte, 48 bit, Hexadecimal address• 00-1A-2B is a manufacturer code.• MAC add is also known as BIA-Burn in address• Machine address, hardware address, Physical

address, Layer 2 address• Every Network card has Unique MAC address

Collision

• How it is Happening

Collision Detection

Collision Avoidance