Computer Networking
TCP is:

Connection orientated and unreliable
Connection orientated and reliable
Connectionless and unreliable
Operates at the Data Link layer
None of these

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Computer Networking
CSMA (Carrier Sense Multiple Access) is

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

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