Computer Networking
Bandlimited signal is

transmission of signals without modulation
simultaneous transmission of data to a number of stations
None of these
a signal all of whose energy is contained within a finite frequency range
All of these

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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?

one bit or any odd number of bits inverted in a byte during transmission
two bits or any even number of bits inverted in a block during transmission
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

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