FTP
File Transfer Protocol

SFTP
Secure File Transfer Protocol

Telnet

SSH
Secure Shell

SMTP
Simple Mail Transfer Protocol

SMTP
SMTP with TLS

Time
Time Protocol

NTP
Network Time Protocol

DNS
Domain Name Service

DoT
DNS over TLS

HTTP
HyperText Transfer Protocol

HTTPS
HyperText Transfer Protocol (SSL / TLS)

IMAP
Internet Message Access Protocol

IMAP
IMAP for SSL / TLS

SNMP
Simple Network Management Protocol

SNMPv3

SMB
Server Message Block

NFS
Network File System

LDAP
Lightweight Directory Access Protocol

LDAPS
Lightweight Access Directory Protocol Secure