Half Duplex Ethernet

Good Day,

I've been doing some reading and some sources say that csma/cd is what detects collision in a half duplex ethernet and others say its a loopback circuit. Which is it?

Thank You.

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Comments

WilliamK99

Not sure what you mean CSMA/CD senses electrical voltage level to see whether multiple devices are talking at once or not, nothing to do with a loop.

Bl8ckr0uter

SB-K wrote: »

Good Day,

I've been doing some reading and some sources say that csma/cd is what detects collision in a half duplex ethernet and others say its a loopback circuit. Which is it?

Thank You.

I think what you mean is CSMA/CD is only used in Half-Duplex communications, like 10 base ethernet and wireless. Full duplex communications do not use this technology because there all no collisions.

I am not sure what a loopback circuit is..Do you mean like a loopback tester or a loopback address (logical)?

krazymofo24

Half-Duplex uses CSMA/CD. Wireless uses CSMA/CA

Bl8ckr0uter

krazymofo24 wrote: »

Half-Duplex uses CSMA/CD. Wireless uses CSMA/CA

True. My mistake. It has been along one.

dynamik

There's a really confusing diagram in Odom's ICND1 book that I think this is in reference too.

tech-airman

SB-K wrote: »

Good Day,

I've been doing some reading and some sources say that csma/cd is what detects collision in a half duplex ethernet and others say its a loopback circuit. Which is it?

Thank You.

SB-K,

It's both.