What is the difference between MPLS and Virtual Circuit?

Q.  What is the difference between MPLS and Virtual Circuit?
- Published on 19 Oct 15

a. The forwarding table is mostly used in MPLS but not in Virtual Circuit.
b. The forwarding table is not constructed in Virtual Circuit but it is constructed in MPLS.
c. In virtual-circuit, the user establishes new connection and launches a set up packet and created the path while there is no set up for each connection in MPLS.
d. All of the above.

ANSWER: In virtual-circuit, the user establishes new connection and launches a set up packet and created the path while there is no set up for each connection in MPLS.

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    Discussion

  • Prajakta Pandit   -Posted on 13 Oct 15

    - Virtual circuit is a means of transporting data over a computer network.

    - It is a dedicated physical layer link between the source and destination.

    - MPLS (Multi Protocol Label Switching) is a label that added in front of each packet and the routing is done on the basis of this label instead of the destination address.

    - This label acts as an index into an internal table. Because of that it becomes very easy to find the correct output line by referring the table.

    - In MPLS, each packet carries a virtual circuit identifier, called label.
    MPLS is a data-carrying mechanism which emulates some properties of a circuit-switched network over a packet-switched network.

    - It can be used to carry many different kinds of traffic, including IP packets, as well as native ATM, SONET and Ethernet frames.

    - In virtual circuit, the user establishes a new connection and launches a set up packet and created the path while there is no setup for each connection in MPLS.

    - In virtual circuit a path is established between the source and the final destination through which all the packets will be routed during a call.

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