HTTP
HyperText Transfer Protocol
HTTPS
HTTP over TLS/SSL
FTP
File Transfer Protocol
Telnet
Telnet
SSH
Secure Shell
SMTP
Simple Mail Transfer Protocol
POP3
Post Office Protocol version 3
IMAP
Internet Message Access Protocol
SMB
Server Message Block (share files and resources like printers)
NFS
Network File System
AFP
Apple Filing Protocol (share files on OSX and MacOS)
SLP
Server Location Protocol (find network services without prior config … like network printers)
LDAP
Lightweight Directory Access Protocol
RDP
Remote Desktop Protocol
NetBIOS
Network Basic Input / Output System
SNMP
Simple Network Management Protocol
Systlog
Syslog
DNS
Domain Name System
DHCP
Dynamic Host Configuration Protocol