Error Detection

Error Detection

Error correction is relatively expensive (computationally and in bandwidth).

For example, 10 redundancy bits are required to correct 1 single-bit error in a 1000-bit message. Detection? In contrast, detecting a single bit error requires only a single-bit, no matter how large the message.

The most popular error detection codes are based on polynomial codes or cyclic redundancy codes (CRCs).

Allows us to acknowledge correctly received frames and to discard incorrect ones.