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?

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

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Computer Networking
Bandlimited signal is

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

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Computer Networking
An encyclopedic database

All of these
is easy for beginners to use
is an information utility that specializes in storing and searching information
is generally free
None of these

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