FTP port

TCP/20, TCP/21

SSH port

TCP/22

Telnet port

Tcp/23

SMTP port

Tcp/25

DNS port

Udp/53, tcp/53

DHCP port

Udp/67, udp/68

HTTP port

Tcp/80

HTTPS port

Tcp/443

POP3 port

Tcp/110

IMAP4 port

Tcp/143

NetBIOS name service port

Udp/137

NetBIOS session service port

Tcp/139

SMB port

Tcp/445

SNMP Query port

Udp/161

SNMP trap port

Udp/162

LDAP port

Tcp/389

RDP port

Tcp/3389

FTP

File transfer protocol

SSH

Secure shell

Telnet

Telecommunication Network

SMTP

Simple mail transfer protocol

DNS

Domain name system

DHCP

Dynamic host configuration protocol

HTTP

Hypertext transfer protocol

HTTPS

Hypertext transfer protocol secure

POP3

Post office protocol version 3

IMAP4

Internet message access protocol version 4

SMB

Server message block

SNMP

Simple network management protocol

LDAP

Lightweight directory access protocol

RDP

Remote desktop protocol

FTP description

Sends and receives files between systems

SSH description

Encrypted console access

Telnet description

Insecure console access

SMTP description

Transfer email between mail servers

DNS description

Convert domain names to IP addresses

DHCP description

Automated the IP address configuration process

HTTP description

Web server communication unsecure

HTTPS description

Web server communication with encryption

POP3 description

Receive email into a email client

IMAP4 description

A newer email client protocol

NetBIOS name service description

Register, remove, and find Windows services by name

NetBIOS session service description

Windows connection-oriented data transfer

SMB description

Windows file transfers and printer sharing

SNMP Query description

Gather metrics and manage network devices

SNMP trap description

Recieve alerts from network devices

LDAP description

Directory services

RDP description

Graphical display of remote devices