Use one of the mux encapsulation options to dedicate the specified PVC to a single protocol; use the snap encapsulation option to multiplex two or more protocols over the same PVC. Whether you select mux or snap encapsulation might depend on practical considerations, such as the type of network and the pricing offered by the network. If the pricing of the network depends on the number of PVCs set up, snap might be the appropriate choice. If pricing depends on the number of bytes transmitted, mux might be the appropriate choice because it has slightly less overhead.
