Port numbers and protocols

FTP - File Transport Protocol

SSH - Secure Shell

SFTP - Secure File Transport Protocol

SCP - Secure Copy

TFTP - Trivial File Transport Protocol

FTPS - File Transport Protocol Secure

SMTP - Simple Mail Transport Protocol

POP3 - Post Office Protocol V3

IMAP4 - Internet Message Access Protocol V4

TelNet

TACACS - Terminal Access Controller Access - Control System

TACACS+

SSL - Secure Sockets Layer

ISAKMP - Internet Security Association and Key Management Protocol

L2TP - Layer 2 Tunneling Protocol

PPTP - Point-to-Point Tunneling Protocol

RDP - Remote Desktop Protocol

DNS - Domain Name System

DHCP - Dynamic Host Configuration Protocol

HTTP - Hypertext Transfer Protocol

HTTPS - Hypertext Transfer Protocol Secure

Kerberos

NNTP - Network News Transfer Protocol

SNMP - Simple Network Management Protocol

SNMP Trap - Simple Network Management Protocol Trap

LDAP - Lightweight Directory Access Protocol

Syslog