In 1992, frame relay was portrayed as an interim technology that would be replaced by Switched Multimegabit Data Service. In 1995, industry insiders predicted frame relay would be devoured by ATM.

Frame relay had a good run, but the rise of MPLS VPNs has spelled the beginning of the end for the old WAN technology. VPNs burst on the scene in the late 1990s as a way to use the Internet securely ...

Frame relay won in the WAN over ATM, which proved too expensive despite its good points, such as five levels of QoS. Now MPLS is pushing aside both. The debate about frame relay vs. ATM as WAN ...

Out go ATM, Frame Relay and leased lines. In come DSL, Ethernet and IP virtual private networks (VPNs). It may not be quite that simple but the world of data communications is in the midst of seeing ...