ZyXEL 24-Port Layer 2 FE Managed Switch with 4x Dual Personality GbE Uplinks (ES3500-24) 16 K MAC address table Policy-based QoS optimizes multi-service quality Policy-based QoS optimizes multi-service quality Multilayer (L2/L3/L4) ACL suite for security protection High redundancy and resilient architecture with RSTP and port trunking IPv6 management support