In the SONET hierarchy, the Term VT:
A) is used to define the higher rate signals mapped into a SONET STS-1 frame
B) stands for video technology
C) both a and b are true
D) neither a nor b is true
Question 2
What is the purpose of crossing the tip and ring wires over each other to form a twisted pair?
A) to produce a canceling effect of the signals and thus eliminate cross talk
B) to block electromagnetic interference from outside influences such as fluorescent lights
C) both a and b are true
D) neither a nor b is true
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