- Lightweight Directory Access Protocol ( LDAP)
- Network News Transport Protocol ( NNTP)
- Post Office Protocol 3 ( POP3)
- Internet Messaging Application Protocol ( IMAP4)
- HTTP/Distributed Authoring and Versioning ( DAV)
- Simple Mail Transfer Protocol ( SMTP)
Within each of these protocols, PATROL monitors the number of authentication and connection failures and the throughput to the various Internet protocol servers.