How does a Frame Relay Work?
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Frame Relay supports the multiplexing of traffic from multiple connections over a shared physical link. It uses hardware components, including router frames, bridges and switches, to pack data into individual frame relay messages. Each connection uses a 10-bit Data Link Connection Identifier (DLCI) for unique channel addressing. There are two types of connections:
Permanent Virtual Circuits (PVCs) for persistent connections are intended to be maintained for long periods even if data is not actively transferred.
Switched Virtual Circuits (SVCs) for temporary connections that last only one session.
Frame Relay then places the data in a variable-size unit called a frame. It leaves any necessary error correction (data retransmission) until the endpoints, speeding up the overall data transmission.