- BEEP: Blocks Extensible Exchange Protocol
- BOOTP: Bootstrap Protocol
- DCAP: Data Link Switching Client Access Protocol
- DHCP: Dynamic Host Configuration Protocol
- DNS: Domain Name Systems
- Finger: User Information Protocol
- FTP: File Transfer Protocol
- HTTP: Hypertext Transfer Protocol
- IMAP & IMAP4: Internet Message Access Protocol (IMAP version 4)
- IPFIX: Internet Protocol Flow Information eXport
- IRCP (IRC): Internet Relay Chat Protocol
- LDAP: Lightweighted Directory Access Protocol
- MIME: Multipurpose Internet Mail Extensions
- NAT: Network Address Translation
- NETCONF: Network Configuration Protocol
- NNTP: Network News Transfer Protocol
- NTP: Network Time Protocol
- POP & POP3: Post Office Protocol (version 3)
- RLOGIN: Remote Login in Unix
- RMON: Remote Monitoring MIBs in SNMP
- S-HTTP: Secure Hypertext Transfer Protocol
- S/MIME: Secure Multipurpose Internet Mail Extensions
- Sitemaps Protocol
- SLP: Service Location Protocol
- SMTP: Simple Mail Transfer Protocol
- SNMP: Simple Network Management Protocol
- SNTP: Simple Network Time Protocol
- Syslog Protocol
- TELNET: TCP/IP Terminal emulation Protocol
- TFTP: Trivial File Transfer Protocol
- URL: Uniform Resource Locator
- Whois (and RWhois): Directory Access Protocol
- XMPP: Extensible Messaging and Presence Protocol
