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Do Switches need to use CSMA/CD
Mr.Noe
Member Posts: 13 ■□□□□□□□□□
in CCNA & CCENT
I thought that only hubs need CSMA/CD, why would a switch need it anyway. I was buying stuff online and this caught my attention http://www.newegg.com/Product/Product.asp?Item=N82E16817201207
It was pretty cheap for a 16 port switch, so what's the catch?
It was pretty cheap for a 16 port switch, so what's the catch?
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Optionsjohndoed0e
Member Posts: 8 ■□□□□□□□□□
CSMA/CD is a half-duplex protocol.
The switch supports it, in case you decide to attach a device that does not operate in a full-duplex mode. Such as a hub. -
Optionsthisisalex02
Member Posts: 136
Switches create a seperate collision domain for each port, hence eliminating the possibility of collisions.Switches are bridges on steroids!
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OptionsTen9t6
Member Posts: 691
thisisalex02 wrote:Switches create a seperate collision domain for each port, hence eliminating the possibility of collisions.
Until a user plugs a hub into that port.
and they will...
To the original question if you buy an Ethernet switch, yes, it will use CSMA/CD.......
If you don't want it, you can always buy a token ring switch..
KennyKenny
A+, Network+, Linux+, Security+, MCSE+I, MCSE:Security, MCDBA, CCNP, CCDP, CCSP, CCVP, CCIE Written (R/S, Voice),INFOSEC, JNCIA (M and FWV), JNCIS (M and FWV), ENA, C|EH, ACA, ACS, ACE, CTP, CISSP, SSCP, MCIWD, CIWSA -
OptionsYankee
Member Posts: 157
johndoe had the right answer. If the switch port is half duplex then collision detection is enabled.
Yankee