Computer Networking
Two computers that communicate with each other use a simple parity check to detect errors for ASCII transmissions. Which of the following events will always lead to an undeleted error?

two bits or any even number of bits inverted in a byte during transmission
None of these
one bit or any odd number of bits inverted in a block of data during transmission
two bits or any even number of bits inverted in a block during transmission
one bit or any odd number of bits inverted in a byte during transmission

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

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