March 2004
Intermediate to advanced
696 pages
16h 32m
English
Content preview from Cisco Frame Relay Solutions Guide
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Appendix A. Answers to Review Questions
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 ... |
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