Secure Shell
(SSH)

Domain Name Service
(DNS)

Simple Mail Transfer Protocol
(SMTP)

Secure File Transfer Protocol
(SFTP)

File Transfer Protocol
(FTP)

TELNET

Trivial File Transfer Protocol
(TFTP)

Dynamic Host Configuration Protocol (DHCP)

Hypertext Transfer Protocol
(HTTP)

Hypertext Transfer Protocol Secure
(HTTPS)

Simple Network Management Protocol
(SNMP)

Remote Desktop Protocol
(RDP)

Network Time Protocol
(NTP)

Session Initiation Protocol
(SIP)

Server Message Block
(SMB)

Post Office Protocol
(POP)

Internet Message Access Protocol
(IMAP)

Lightweight Directory Access Protocol
(LDAP)

Lightweight Directory Access Protocol Secure
(LDAPS)

H.323
(Video)

Internet Control Message Protocol
(ICMP)

User Datagram Protocol
(UDP)

Internet Protocol
(IP)

Transmission Control Protocol
(TCP)