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
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 byte during transmission

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Computer Networking
What is a stub network?

A network that has only one entry and exit point.
A network with only one entry and no exit point.
A network with more than one exit point.
A network with more than one exit and entry point.

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