Computer Networks · Question 27 · Hard
Using CRC with the generator polynomial x^3 + x + 1 (bits 1011), what remainder (CRC bits) is appended to the data 110101?
- 011
- 101
- 111
- 110
Answer and explanation
Answer: C. 111
Explanation: Append 3 zeros to get 110101000 and divide by 1011 using modulo-2 (XOR) division. The remainder is 111, so the transmitted frame is 110101111, which leaves remainder 000 when divided by 1011.
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