Computer Networking
Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.

3, 2, 1, none
All of these
3, 3, 1, 7
3, 3, 2, none
3, 2, 1, 7

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Computer Networking
MAC is

None of these
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
network access standard for connecting stations to a circuit-switched network
a method access control technique or multiple-access transmission media

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