Multi Protocol Label Switching (MPLS) is a switching technology that regulates data traffic and packet forwarding in a complex network. A connection-oriented methodology that traverses packets from source to destination node across networks is what it does for fast packet transmission. It has the feature of encompassing packets in the presence different network protocols.
In traditional IP routing, packets undergo analysis at each hop, followed by forwarding decision using network header analysis and then lookup in routing table. In an MPLS network, packets carrying data are assigned with labels on each node and the forwarding decision is totally based on these label headers. This is different from the conventional routing mechanism. Packet header is analyzed only once while they enter the MPLS cloud from then the forwarding decision is ‘label-based’ that ensures fast packet transmission between local-local and local-remote nodes.