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

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

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Computer Networking
Which statement describes a spanning-tree network that has converged?

All switch and bridge ports are assigned as either root or designated ports.
All switch and bridge ports are either blocking or looping.
All switch and bridge ports are in either the forwarding or blocking state.
All switch and bridge ports are in the forwarding state.

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Computer Networking
Parity bit is

a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and
a check bit appended to an array of binary digits to make the sum of all the binary digits.
the ratio of the number of data units in error to the total number of data units
None of these
an error-detecting code based on a summation operation performed on the bits to be checked.

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