Windows 2000 supports the following standard features: Ability to bind to multiple network adapters with different media types Logical and physical multihoming Internal IP routing capability Internet Group Management Protocol (IGMP) version 2 (IP Multicasting) Duplicate IP address detection Multiple default gateways Dead gateway detection Automatic Path Maximum Transmission Unit (PMTU) discovery IP Security (IPSec) Quality of Service (QoS) ATM Services Virtual Private Networks (VPNs) Layer 2 Tunneling Protocol (L2TP)