Network Protocols and Port Numbers

Front

File Transfer Protocol (FTP)

Back

Port Number: 20/21, Protocol: TCP

Front

Secure Shell (SSH)

Back

Port Number: 22, Protocol: TCP

Front

Secure File Transfer Protocol (SFTP)

Back

Port Number: 22, Protocol: TCP

Front

Telnet

Back

Port Number: 23, Protocol: TCP

Front

Simple Mail Transfer Protocol (SMTP)

Back

Port Number: 25, Protocol: TCP

Front

Domain Name System (DNS)

Back

Port Number: 53, Protocol: Both

Front

Dynamic Host Configuration Protocol (DHCP)

Back

Port Number: 67/68, Protocol: UDP

Front

Trivial File Transfer Protocol (TFTP)

Back

Port Number: 69, Protocol: UDP

Front

Hypertext Transfer Protocol (HTTP)

Back

Port Number: 80, Protocol: TCP

Front

Post Office Protocol v3 (POP3)

Back

Port Number: 110, Protocol: TCP