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

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

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Computer Networking
HDLC (High-level Data Link Control) is

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

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Computer Networking
If routers in a single area are configured with the same priority value, what value does a router use for the OSPF Router ID in the absence of a loopback interface?

The highest IP address of any logical interface
The highest IP address of any physical interface
The lowest IP address of any logical interface
The lowest IP address of any physical interface

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