What is Frame Relay?
Frame Relay is a high-speed packet-switched technology for interconnecting geographically dispersed LANs or WANs via a shared network. To minimize protocol overheads associated with legacy WAN technology such as X.25, Frame Relay does not perform any error correction functions at the data-link layer where it operates. Rather, Frame Relay relies on upper-layer protocols to recover from errors or loss of frames. The Frame Relay header only supports a CRC field to detect corrupted frames. Hence, Frame Relay requires a reliable physical layer transport medium.
What is a virtual circuit?
A virtual circuit is an end-to-end logical connection between two end points set up ...