Computer Networking
The data communication support should include, but is not restricted to

terminal support, electronic mail and voice grams.
All of these
file and database access
file transfer and transaction processing

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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 block of data during transmission
None of these
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

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