Computer Networking
What is the name of the software package that allows people to send electronic mail along a network of computers and workstations?

Data communication package
Electronic mail package
Memory resident package
Project management package
None of these

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Computer Networking
Parity bit is

a check bit appended to an array of binary digits to make the sum of all the binary digits.
None of these
the ratio of the number of data units in error to the total number of data units
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
an error-detecting code based on a summation operation performed on the bits to be checked.

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Computer Networking
Ethernet networks can be cabled in a number of topologies, depending on what works best in each environment. As more nodes are added, the efficiency of Ethernet decreases. Select the best answer as to why Ethernet becomes less efficient as size increases.

Cable terminators do not absorb the signal properly
Cable terminators do not reflect the signal properly
Network collisions occur
Repeaters cannot increase the signal strength sufficiently
"Line echo" occurs due to the impedance of the cable

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