A. Answer the following questions briefly. 1. Explain the difference between error detection and error correction. 2. Describe the difference between redundancy and redundancy checking. 3. Explain the difference between using ARQ and a Hamming code. 4. What will be the outcome of X-ORing Hamming bits if no error occurs in the data word during transmission? 5. Determine the LRC and VRC for the following ASCII-encoded message (use even parity for LRC and odd parity for VCR): DATA sp COMMUNICATIONS