What is virtual circuit?

Virtual Circuit

In telecommunications and computer networks, a virtual circuit (VC), synonymous with virtual connection and virtual channel, is a connection oriented communication service that is delivered by means of packet mode communication. After a connection or virtual circuit is established between two nodes or application processes, a bit stream or byte stream may be delivered between the nodes; a virtual circuit protocol allows higher level protocols to avoid dealing with the division of data into segments, packets, or frames.

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Some articles on virtual circuit:

Americans With Disabilities Act Of 1990 - ADA Case Law
... sidewalks were covered by the ADA, was appealed to the 9th Circuit Court of Appeals, which ruled that sidewalks were a "program" under ADA and must be made accessible to ... which refused to hear the case, letting stand the ruling of the 9th Circuit Court ... was accepted by a federal court in Florida and, subsequently, the Fifth Circuit Court of Appeals ...
Connection-oriented Communication
... Circuit mode communication, for example the public switched telephone network, ISDN, SONET/SDH and optical mesh networks, are examples of connection-oriented communication ... Circuit mode communication provides guarantees that data will arrive with constant bandwidth and at constant delay ... Packet mode communication may also be connection-oriented, which is called virtual circuit mode communication ...
ATM Adaptation Layer 5 - Packet Type and Multiplexing
... This means that either the two hosts at the ends of a virtual circuit must agree a priori that the circuit will be used for one specific protocol (e.g ... the circuit will only be used to send IP datagrams), or the two hosts at the ends of a virtual circuit must agree a priori that some octets of the data area will be ... The former scheme, in which the hosts agree on the high-level protocol for a given circuit, is referred to in RFC 2684 as "VC Multiplexing" ...
Multiprotocol Encapsulation Over ATM
... RFC 2684 describes two encapsulation mechanisms for network traffic Virtual and DSL modems often include a setting for RFC 1483 bridging ... Multiplexing (VC-MUX), the hosts agree on the high-level protocol for a given circuit ... chief disadvantage of such a scheme lies in duplication of virtual circuits a host must create a separate virtual circuit for each high-level protocol if more than one ...
Permanent and Switched Virtual Circuits in ATM, Frame Relay, and X.25
... Switched virtual circuits (SVCs) are generally set up on a per-call basis and are disconnected when the call is terminated however, a permanent virtual circuit (PVC) can be established as ... A switched virtual circuit (SVC) is a virtual circuit that is dynamically established on demand and is torn down when transmission is complete, for example after a phone call ... A permanent virtual circuit (PVC) is a virtual circuit established for repeated/continuous use between the same DTE ...

Famous quotes containing the words circuit and/or virtual:

    The Father and His angelic hierarchy
    That made the magnitude and glory there
    Stood in the circuit of a needle’s eye.
    William Butler Yeats (1865–1939)

    Neither dead nor alive, the hostage is suspended by an incalculable outcome. It is not his destiny that awaits for him, nor his own death, but anonymous chance, which can only seem to him something absolutely arbitrary.... He is in a state of radical emergency, of virtual extermination.
    Jean Baudrillard (b. 1929)