Computer Networking
Start and stop bits are used in serial communication for

Error detection
Synchronization
Slowing down the communication
Error correction

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Computer Networking
MAC is

network access standard for connecting stations to a circuit-switched network
None of these
a method access control technique or multiple-access transmission media
a very common bit-oriented data link protocol issued to ISO.
a method of determining which device has access to the transmission medium at any time

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