Multi - protocol label switching ( mpls ) is a key enabling technology for next generation networks . it was originally conceived to combine the flexibility of ip hop - by - hop routing with the quality of service and traffic engineering benefits of connection - oriented protocols such as atm Multi - protocollabelswitching ( mpls )是下一代網(wǎng)絡(luò)的重要技術(shù),它mpls吸收了atm和ip的優(yōu)點,將atm的面向連接和ip的選路結(jié)合一起。