Definition
MPLS, or Multiprotocol Label Switching, is a networking technology that directs data traffic based on short path labels rather than long network addresses. It inserts labels into network packets, allowing routers to make forwarding decisions quickly without needing to perform complex lookups. This approach significantly speeds up data transmission and improves network efficiency by bypassing traditional routing protocols. MPLS is commonly used by service providers to create virtual private networks (VPNs) that offer enhanced security and performance for enterprise customers. It differs from standard IP routing by using labels for faster forwarding, which can sometimes be confused with VLAN tagging, though MPLS operates at a higher layer. Understanding MPLS is crucial for network professionals and appears on certifications like CompTIA Network+ and CISSP.