The following data stream is received on a USB 2.0 data link. What is the actual source data stream?
000101111110111111011111101101111101111110111
USB uses NRZI (non?return to zero invert) encoding. A 1 is represented by no change in signal level and a 0 by a
change in level. A constant sequence of 1s is represented by a constant level. That is not practical, because a clock
is needed to separate the bits. In order to ensure sufficient signal transitions, bit stuffing is used. After every six
bits in the data stream a 1 is inserted at the transmitter. At the receiver, the zero following six ones in a data
message is deleted. In this case:
000101111110111111011111101101111101111110111 becomes
00010111111111111111111110111110111111111
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What will be an ideal response?
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