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

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Computer Networking
Which of the following characteristic(s) is/are suited to the PSS applications?

widely dispersed terminals and access to international packets switched services
None of these
All of these
Multiple remote host or applications accessed by a single local access circuit terminal and circuit
bursty traffic and low communications intensity

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