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ARP - ARP dynamic learning, ARP static binding, free ARP anti-spoofing
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Ethernet protocol - 802.3 protocol family, 802.1Q VLAN, Rate-limit, broadcast storm suppression
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Link layer protocol - Point to Point Protocol (PPP)
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WAN access - Static IP address, DHCP dynamic IP and PPPoE dial-up access, Multi-line networking, Load balancing of multiple policies (equivalent, weighted)
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Routing protocol - Static routing, PBR, RIP v1/v2, OSPF v2, BGP, Floating routing and routing automatic backup
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NAT - NAT based on IP, port and address pool, SNAT, DNAT, NAT port mapping, NAT Application Layer Gateway (ALG)
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Network security - AAA, PPP, CHAP and MS-CHAP authentication, IP and MAC-based ACL firewall policy Rich VPN protocols such as IKE, IPSec, L2TP/PPTP, GRE