| Layer 7 Application Layer |
| | AFP | AppleTalk Filing Protocol |
| | BOOTP | Bootstrap Protocol |
| | CIFS | Common Internet File System |
| | CIP | Common Indexing Protocol |
| | COPS | Common Open Policy Service |
| | DHCP | Dynamic Host Configuration Protocol |
| | DNS | Domain Name System |
| | Finger | Finger |
| | FTP | File Transfer Protocol |
| | FTP - Ctrl | File Transfer Protocol - Control |
| | FTP - Data | File Transfer Protocol - Data Protocol |
| | Gopher | Gopher Protocol |
| | HSRP | Hot Standby Router Protocol |
| | HTTP | HyperText Transfer Protocol |
| | HTTPS | Secure HTTP Protocol |
| | ICP | Internet Cache Protocol |
| | ICQ | |
| | IMAP | Interactive Mail Access Protocol |
| | IMAP3 | Internet Message Access Protocol 3 |
| | IMAPS | Secure Internet Message Access Protocol |
| | Kerberos | Kerberos |
| | LPD | Line Printer Daemon |
| | MGCP | Media Gateway Control Protocol |
| | MSN | MSN Messenger Service |
| | MSRDP | Microsoft Remote Desktop Protocol |
| | MSSQL | Microsoft SQL Server |
| | NCP | NetWare Core Protocol |
| | NFS | Network File System |
| | NNTP | Network News Transfer Protocol |
| | NTP | Network Time Protocol |
| | POP | Post Office Protocol |
| | POP3 | Post Office Protocol Version 3 |
| | POP3s | POP3 over TLS/SSL |
| | RADIUS | Remote Authentication Dial-In User Service |
| | RLOGIN | Remote Login Protocol |
| | RRP | NSI Registry Registrar Protocol |
| | RSH | Remote Shell Protocol |
| | RTCP | Real-Time Transport Control Protocol |
| | RTELNET | Remote Telnet service |
| | RTP | Real-time Transport Protocol |
| | RTP Audio | Real-time Transport Protocol Audio |
| | RTP Video | Real-time Transport Protocol Video |
| | RTSP | Real Time Streaming Protocol |
| | SAP | Session Announcement Protocol |
| | SIP | Session Initiation Protocol |
| | SLP | Service Location Protocol |
| | SMB | Server Message Block |
| | SMTP | Simple Mail Transfer Protocol |
| | SNA | Systems Network Architecture |
| | SNMP | Simple Network Management Protocol |
| | SOCKS | Protocol for sessions traversal across firewall securely |
| | SSH | Secure Shell Protocol |
| | Telnet | Telnet |
| | TELNET | Virtual Terminal Connection Service |
| | TFTP | Trivial File Transfer Protocol |
| | WhoIs | WhoIs |
| | WINS | Windows Internet Name Service |
|
| Layer 6 Presentation Layer |
| | NBNS | NetBIOS Name Service |
| | NBSSN | NetBIOS Session Service |
| | NCP | NetWare Core Protocol |
| | NetBIOS | Network Basic Input/Output System |
|
| Layer 5 Session Layer |
| | LDAP | Lightweight Directory Access Protocol |
| | LDAPS | Secure Lightweight Directory Access Protocol |
| | NCP | NetWare Core Protocol |
| | NetBEUI | NetBIOS Extended User Interface |
| | RPC | Remote Procedure Call protocol |
|
| Layer 4 Transport Layer |
| | H.225 | H.225 |
| | H.323 | H.323 |
| | NBDGM | NetBIOS Datagram Service |
| | NetBEUI | NetBIOS Extended User Interface |
| | PUP | (Xerox) Parc Universal Packet |
| | SCTP | Stream Control Transmission Protocol |
| | TCP | Transmission Control Protocol |
| | UDP | User Datagram Protocol |
|
| Layer 3 Network Layer |
| | AARP | AppleTalk Address Resolution Protocol |
| | AH | Authentication Header |
| | BGP | Border Gateway Protocol |
| | EGP | Exterior Gateway Protocol |
| | EIGRP | Enhanced Interior Gateway Routing Protocol |
| | ESP | Encapsulated Security Payload |
| | GRE | Generic Routing Encapsulation |
| | GTP | GPRS Tunneling Protocol |
| | ICMP | Internet Control Message Protocol |
| | ICMPv6 | Internet Control Message Protocol Version 6 |
| | IGMP | Internet Group Management Protocol |
| | IGRP | Interior Gateway Routing Protocol |
| | IP | Internet Protocol |
| | IP Fragment | IP Fragment |
| | IPv6 | Internet Protocol version 6 |
| | IPX | Internet Packet Exchange |
| | Mobile IP | Mobile IP |
| | MPLS | Multi-Protocol Label Switching |
| | OSPF | Open Shortest Path First Routing Protocol |
| | PIM | Protocol Independent Multicast |
| | PPPoE | PPP over Ethernet |
| | RIP | Routing Information Protocol |
| | RSVP | Resource Reservation Protocol |
| | STP | Spanning Tree Protocol |
| | VRRP | Virtual Router Redundancy Protocol |
|
| Layer 2 Data Link Layer |
| | ARP | Address Resolution Protocol |
| | CDP | Cisco Discovery Protocol |
| | CGMP | Cisco Group Management Protocol |
| | Ethernet SNAP | Ethernet SubNetwork Access Protocol |
| | EthernetII | Ethernet Type 2 |
| | IEEE 802.2 | IEEE 802.2 |
| | IEEE 802.3 | |
| | L2TP | Layer Two Tunneling Protocol |
| | PPP | Point-to-Point Protocol |
| | PPTP | Point-to-Point Tunneling Protocol |
| | RARP | Reverse Address Resolution Protocol |
| | SQL | Structured Query Language |
| | VLAN | 802.1Q VLAN |
|
| Layer 1 Physical Layer |
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