1.1 PORTS AND PROTOCOL DEFINITIONS - COMPTIA NET+

FTP port info

TCP 20/21

FTP

File Transfer Protocol - transfers files between systems.

SSH/SFTP port info

TCP 22

SSH/SFTP

Secure Shell / Secure File Transfer Protocol - encrypted remote login and file transfers.

Telnet port info

TCP 23

Telnet

Remote command-line access (not encrypted

SMTP port info

TCP 25

SMTP

Simple Mail Transfer Protocol - sends email.

DNS port info

TCP/UDP 53

DNS

Domain Name System - resolves domain names to IP addresses.

HTTP port info

TCP 80

HTTP

Hypertext Transfer Protocol - loads web pages (unencrypted).

LDAP port info

TCP 389

LDAP

Lightweight Directory Access Protocol - accesses directory services; used for storing user information, authentication, and authorization in software applications

HTTPS port info

TCP 443

HTTPS

Secure HTTP using TLS encryption - loads encrypted websites.

SMB port info

TCP 445

SMB

Server Message Block - file and printer sharing on Windows networks.

SMTPS port info

TCP 587

SMTPS

Secure SMTP - sends encrypted email.

LDAPS port info

TCP 636

LDAPS

Secure LDAP using SSL/TLS.

SQL Server port info

TCP 1433

SQL Server

Microsoft SQL Server communication port.

RDP port info

TCP/UDP 3389

RDP

Remote Desktop Protocol - remote access to Windows systems.

SIP port info

TCP/UDP 5060/5061

SIP

Session Initiation Protocol - used for setting up VoIP calls.

DHCP Server port info

UDP 67

DHCP Server

Assigns IP addresses to clients.

DHCP Client port info

UDP 68

DHCP Client

Receives IP address assignment from DHCP server.

TFTP port info

UDP 69

TFTP

Trivial File Transfer Protocol - simple file transfers with no authentication.

NTP port info

UDP 123

NTP

Network Time Protocol - synchronizes clocks on network devices.

SNMP port info

UDP 161/162

SNMP

Simple Network Management Protocol - monitors and manages network devices.

Syslog port info

UDP 514

Syslog

Sends system event messages to logging server.