In ATM, there are virtual paths (VP) consisting of several virtual channels
(VC). A virtual channel is the logical connection for the transport of ATM cells between two or more points. These can be end-to-end connections, or connections between subscribers and network nodes
, or connections between network nodes.connection type, the VCI field can be rewritten in ATM exchanges. The identification of the cells provides a unique treatment of the ATM cells on the ATM layer in all network components.