05 - Error

Single Bit Error

The term single-bit error means that only 1 bit of a given data unit

Burst Error

Means that 2 or more bits in the data unit have changed from 1 to 0 or 0 to 1.

Vertical Redundancy Check

Basic error detection technique in which an extra bit, called a parity bit is added before transmission.

Even Parity

The parity is set so that the total number of 1s in the data is even.

Odd Parity

The parity bit is set so that the total number of 1s in the data is odd

Checksum

In this error detection method, the sender divides the data into fixed-size segments and computes a checksum using 1’s complement.

Cyclic Redundancy Check

Based on binary division, the redundant bits are appended to the transmitted data.

Stop and Wait Flow Control

The simplest form of flow control, source entity transmit a frame;. The destination entity indicates its willingness to another frame by sending back an acknowledgement.

Error Control

Refers to mechanisms to detect and correct errors that occur in the transmission of frames.

Lost Frame

A frame that fails to arrive at the other side.

Automatic Repeat Request ARQ

Helps transfer unreliable data link into a reliable one.

Go-Back-N ARQ

Uses the concept of protocol pipelining where the sender can send multiple frames before receiving the acknowledgement for the first frame.

Selective Repeat ARQ

Only lost frames are retransmitted in this ARQ method.

High Level Data Link Control HDLC

Standardized from the Synchronous Data Link Protocol by IBM. It is a bit oriented protocol.