Computer Networking
The corporate office sends you a new router to connect, but upon connecting the console cable, you see that there is already a configuration on the router. What should be done before a new configuration is entered in the router?

The new configuration should be entered and saved.
RAM should be erased and the router restarted.
Flash should be erased and the router restarted.
NVRAM should be erased and the router restarted.

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Computer Networking
Error detecting code is

a code in which each expression conforms to specify 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
None of these
the ratio of the data units in error to the total number of data units
a check bit appended to an array of binary digits to make the sum of all the binary digits.

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

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Computer Networking
A front-end processor is

a minicomputer that relieves main-frame computers at a computer centre of communications control functions
a user computer system
a processor in a large-scale computer that executes operating system instructions
preliminary processor of batch jobs.
None of these

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