Explain the challenge in digital communications regarding the transmission of a long string of values and describe how it can be overcome.
What will be an ideal response?
One of the challenges in digital communications is the transmission of a long string of values, given that this requires careful synchronization between systems to keep the bit count on long strings. The alternative is to embed a synchronization point in the bit stream - sort of like using a metronome for a music performance. Ethernet LANs use Manchester encoding, which provides a synchronization point in mid-bit, encodes a 1 bit as a transition between a low and high value and a 0 bit as a shift between a high and low value. Most modern Ethernet implementations use a voltage level of approximately +/- 1 volt, depending on the technology deployed.
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