What is the biggest disadvantage to adding error detection bits to a data stream to check for bit errors? O Hardware techniques are more effective O They can be quite complex O Data Rate must increase to pass same level of information O None of the above

Error Correction/Detection Hamming Algorithm ; Help with the following examples. For the Hamming code shown in Figure, when a check bit rather than a data bit is in error, would the Hamming Algorithm (1) not detect it; (2) detect it but cannot provide information to correct it; (3) detect and correct it? Can you please explain why

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52. Multiplexing STS-1 multiple data streams, called tributaries, plays an important role in SONET. A 3:1 multiplexer multiplexes three input STS-1 tributaries onto one out- put STS-3 stream. This multiplexing is done byte for byte. That is, the first three out- put bytes are the first bytes of tributaries 1, 2, and 3, respectively. the next three out- put bytes are the second bytes of tributaries 1, 2, and 3, respectively, and so on. Write a program that simulates this 3:1 multiplexer. Your program should consist of five processes. The main process creates four processes, one each for the three STS-1 tri- butaries and one for the multiplexer. Each tributary process reads in an STS-1 frame from an input file as a sequence of 810 bytes. They send their frames (byte by byte) to the multiplexer process. The multiplexer process receives these bytes and outputs an STS-3 frame (byte by byte) by writing it to standard output. Use pipes for communi- cation among processes.