Data Link Layer Analysis Essay Example

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Data link layer functions

There are methods available for error detection, including parity check and cyclic redundancy check. Parity check involves adding an extra bit to the original bit frame to ensure the total number of ones is either even for even parity or odd for odd parity.

Cyclic redundancy check is a mechanism that verifies the validity of the received data frame. This mechanism utilizes binary division with polynomials to determine the divisor. The remainder obtained from the division is then appended to the original data by the sender. Two techniques for error correction are employed: forward error correction and backward error correction. In forward error correction, the recipient detects errors and utilizes an error-correcting code to automatically recover and correct some errors. On the other hand, backward error correction involves the receiver signaling the sender about detected errors and requesting a resend of the data unit.

Errors can be avoided by consistently monitoring them and addressing them promptly. It is important for the experts who developed the network to anticipate errors and have a contingency plan in place.