Suppose I have 2 switches; one CSMA/CA (gigabit) and the other CSMA/CD (gigabit), would they work together when connected and if so would there be any dip in network performance?
Thanks in advance!
1
-
2Switches don't do CA - that's a wireless thing. And gigabit doesn't do CD as it's full duplex by design.– RickyMar 21, 2018 at 3:05
Add a comment
|
2 Answers
CSMA/CA is used on Wi-Fi, a shared wireless medium, while CSMA/CD is used on wired ethernet.
The closest you come to mixing them would be a WAP (Wireless Access Point) that translates and bridges between Wi-Fi and ethernet. The WAP will use CSMA/CD on the ethernet interface, and CSMA/CA on the radio.
answered Mar 21, 2018 at 2:17
- Switches usually use full-duplex links that can't experience collisions.
- Gigabit Ethernet only theoretically supports half-duplex transmission (using CSMA/CD) but you won't find hardware for that.
- In a given collision domain, only one scheme can be used. Multiple collision domains using the same or different access schemes can be bridged however.
In theory,
- CSMA/CA could also work on wired networks.
- If a switch supported CSMA/CD and CSMA/CA alternatively on its ports (and it was clear what to use) it could switch between multiple collision domains using different collision schemes.
A switch forwards frames based on their destination MAC addresses, on layer 2. CSMA/CD/CA are access schemes for the physical layer (L1) - they have little to no impact on L2.
