In en.wikipedia.org/wiki/Channel_access_method,
A channel-access scheme is based on a multiplexing method, that allows several data streams or signals to share the same communication channel or physical medium. Multiplexing is in this context provided by the physical layer.
multiplexing also may be used in full-duplex point-to-point communication between nodes in a switched network, which should not be considered as multiple access
Why "multiplexing also may be used in full-duplex point-to-point communication between nodes in a switched network, which should not be considered as multiple access"?
In en.wikipedia.org/wiki/Media_access_control,
Examples of shared physical media are ..., and half-duplex point-to-point links.
Are "shared physical media" the same as "multiple access media"? Why are "half-duplex point-to-point links" "shared physical media"?
Thanks.