How do protocols such as ATM and Frame-Relay support differentiating multiple customers or traffic types on the same physical wire?
How do protocols such as ATM and Frame-Relay support differentiating multiple customers or traffic types on the same physical wire?
ATM (Asynchronous Transfer Mode) and Frame-Relay are both circuit-switched protocols. They utilize Virtual Circuits (VCs) to create logical separation of traffic on the same physical wire. Virtual Circuits allow multiple customers or types of traffic to be distinguished and managed independently, ensuring that data intended for one virtual circuit does not interfere with data intended for another. This method effectively segregates traffic and supports the communication needs of various customers or applications over a single physical medium.
A is correct. They use virtual circuits. (in regards to frame relay) "DLCI-Data Link Connection Identifier Bits. The DLCI serves to identify the virtual connection so that the receiving end knows which information connection a frame belongs to. Note that this DLCI has only local significance. A single physical channel can multiplex several different virtual connections." https://en.wikipedia.org/wiki/Frame_Relay