CSMA/CD : Day 3

1. Carrier Sense Multiple Access / Collision Detection:

     It is the working principle of Ethernet.

2. Communication:

• Half Duplex: Either send or receive. E.g. Wireless, hub
• Full-Duplex: Both send & receive at the same time. E.g. Modern switch.

3. MAC Address:

• 48 - bit physical address



MAC Address

• First 24-bit is known as OUI (Organizationally Unique Identifier)

 

4. Cabling Standard:

• Standard is maintained by TIA / EIA
• Auto-MDX is a feature which can accept both serial and crossover cable.

5. Broadcast Domain:

•  Area of the broadcast up to where the broadcast can go.
• Every port of a router is a broadcast domain.

6. Collision Domain: 

• Every switch-port is a collision domain.
• Every switch-port separates a collision domain.