... 802.1Q, 4096 VLAN Support QinQ and selective QinQ IP application IP Protocol(IP support both of IPv4 and IPv6) Default Routing, ... ACL Support ACL based on source/definition IP, MAC, L3 IP, TCP/UDP port number, IP PRI(DSCP,ToS, Precedence), Time Support ... IP address clone All the above technologies efficiently prevent various DOS attack (e.g. ARP, Synflood, Smurf,ICMP attack), support ARP monitoring ...