Frame Relay is a virtual circuit technology that provides low-level (physical and data link layers) services in response to following demands:
o Higher data rate at lower cost
o Bursty data—bandwidth on demand—bursty data requires different bandwidth allocation at different times.
o Less overhead due to improved transmission media
• The most technical innovation to come out of the standardization work on narrowband ISDN is the frame relay.
• Frame relay is a streamlined technique for packet switching that operates at the data link layer with much less overhead than packet switching X.25
• Standardization of the frame-mode bearer service, or frame relay, was done by both ITU-T and ANSI.
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