Computer Networking
What frequency range is used for microwave communications, satellite and radar?

Super High Frequency : 3000 MHz to 30000 MHz
None of these
Extremely High Frequency :30,000 MHz
Low Frequency : 30 kHz to 300 kHz
Medium Frequency : 300 kHz to 3 MHz

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Computer Networking
MAC is

a very common bit-oriented data link protocol issued to ISO.
None of these
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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