Question: A modified CRC procedure is commonly used in communications standards. It is defined as follows: and k is the number of bits being checked (address,

A modified CRC procedure is commonly used in communications standards. It is defined as follows: where X16D(X) XL(X) = P(X) FCS L(X) +R(X) R(X) = Q+ P(X)

and k is the number of bits being checked (address, control, and information fields).

a. Describe in words the effect of this procedure.

b. Explain the potential benefits.

c. Show a shift-register implementation for P1X2 = X16 + X12 + X5 + 1.

where X16D(X) XL(X) = P(X) FCS L(X) +R(X) R(X) = Q+ P(X) L(X) X15X14+ X13+.... = +X+1

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