VXLAN (Virtual Extensible LAN) is a network virtualization technology that reduces the need for Spanning Tree Protocol (STP) by allowing Layer 2 networks to be extended over Layer 3 networks. It supports both unicast and multicast traffic, enabling more efficient use of network paths and reducing the potential for loops, which STP is designed to prevent1. References: Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) v1.0