RFC 768 — UDP (User Datagram Protocol)
RFC 791 — IP (Internet Protocol)
RFC 792 — ICMP (Internet Control Message Protocol)
RFC 793 — TCP (Transmission Control Protocol)
RFC 826 — ARP (Address Resolution Protocol)
RFC 854 — Telnet Client & Server (Remote Login)
RFC 862 — Echo Protocol
RFC 863 — Discard Protocol
RFC 1027 — Using ARP to Implement Transparent Subnet Gateways (Proxy ARP)
RFC 1059, RFC 1119 — NTPv1/v2 (Network Time Protocol Version 1 and 2)
RFC 1112 — IGMP (Internet Group Management Protocol) Host Extensions for IP Multicasting
RFC 1191 — Path MTU Discovery
RFC 1542 — Bootstrap Protocol Extensions & DHCP Relay Agent
RFC 1851 — ESP Triple DES Transform (Encryption)
RFC 1994 — PPP CHAP (Challenge Handshake Authentication Protocol)
RFC 2068 — HTTP (Hypertext Transfer Protocol)
RFC 2131 — DHCP (Dynamic Host Configuration Protocol) Server
RFC 2138 — RADIUS (Remote Authentication Dial-In User Service) Authentication
RFC 2139 — RADIUS Accounting
RFC 2236 — IGMPv2 (Internet Group Management Protocol Version 2)
RFC 2474 — DiffServ Precedence (Differentiated Services Field)
RFC 2475 — DiffServ Architecture (Core and Edge Router Functions)
RFC 2597 — DiffServ Assured Forwarding
RFC 2598 — DiffServ Expedited Forwarding
RFC 2644 — Directed Broadcasts
RFC 2865 — RADIUS (Remote Authentication Dial-In User Service)
RFC 3046 — DHCP Relay Agent Information Option
RFC 3222 — Forwarding Information Base (FIB)