Similarities between CSMA/CD and CSMA/CA
1. Each station has an equal right to the medium.
2. Each station senses the medium.
Differences between CSMA/CD and CSMA/CA
1. CSMA/CD: A station can send if it senses no signal on the line.
2. CSMA/CA: A station needs to inform other stations that it needs the medium for a specific amount of time.
3. CSMA/CD: A collision can occur.
4. CSMA/CA: Collisions are avoided.