MPLS aim to offer advanced IP network VPN

To meet high-level demands of security and efficiency in the backbone networks, MPLS aim to offer advanced IP network TE mechanisms these will facilitate the ISPs for easily evaluating, examining and meeting a variety of their service necessities a-cross the backbone. By the use of intelligent routers and speedy switches MPLS provides a technique for mapping IP segments with connection-based transport (such as frame relay or ATM) more efficiently. This supports the QoS definition inside the header of MPLS (Rosen et al., 2001; Rosen et al., 1999) as well. Using routing statistics of layer 3, MPLS distributes resources and builds forwarding tables for routing, while it utilizes layer 2 for switching or forwarding the information through the right link or route. Each IP packet includes a label of MPLS which is subsequently linked with a specific entry inside the forward routing table that identifies the upcoming hop. The network-flows with similar requirements for level of service and routing decisions, commonly keep the same pathway/route across the network resulting in a consistency of service-level for network-flows which having higher priority. MPLS is required to deploy the Label Switching Routers (Das et al., 2003) in the networks that will affect the momentum whereupon MPLS based solution is deployed. At the moment, MPLS is at target in favor of deployment in the backbones first.