Frame relay

We discussed previously how X.25 segmented the original data being transmitted by breaking it down into packets. Frame relay utilizes a similar technique, but breaks the original data into chunks of data known as frames. However, confusingly, it is still referred to as packet-switching technology. Devices in a frame relay network are similar to those used in an X.25 network, except the former uses a Frame Relay Access Device (FRAD) instead of a PAD, and the DCE is a device known as frame relay switch instead of the CSU/DSU (Figure 3.14):

Figure 3.14: Frame relay

With frame relay, the virtual circuits created are not dedicated to ...

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