A+ 1201 Ports for Ch. 7

FTP

Port: 20-21 | Protocol: TCP | Purpose: File Transfer Protocol. Transfers files between client and server.

SSH

Port: 22 | Protocol: TCP | Purpose: Secure Shell. Encrypted remote access to servers and devices.

Telnet

Port: 23 | Protocol: TCP | Purpose: Unencrypted remote access. Insecure.

SMTP

Port: 25 | Protocol: TCP | Purpose: Simple Mail Transfer Protocol. Sends email.

DNS

Port: 53 | Protocol: UDP/TCP | Purpose: Domain Name System. Resolves domain names to IP addresses.

DHCP

Port: 67/68 | Protocol: UDP | Purpose: Dynamic Host Configuration Protocol. Automatically assigns IP addresses and network settings.

HTTP

Port: 80 | Protocol: TCP | Purpose: Hypertext Transfer Protocol. Unencrypted web traffic.

POP3

Port: 110 | Protocol: TCP | Purpose: Post Office Protocol 3. Downloads email from the server, usually removing it there.

IMAP

Port: 143 | Protocol: TCP | Purpose: Internet Mail Access Protocol. Syncs email across devices and keeps it on the server.

NetBIOS

Port: 137-139 | Protocol: UDP/TCP | Purpose: Network Basic Input/Output System. Legacy name and session services for Windows networking.

LDAP

Port: 389 | Protocol: TCP | Purpose: Lightweight Directory Access Protocol. Queries directory services such as Active Directory.

HTTPS

Port: 443 | Protocol: TCP | Purpose: HTTP Secure. Encrypted web traffic.

SMB

Port: 445 | Protocol: TCP | Purpose: Server Message Block (also CIFS). Windows file and printer sharing.

RDP

Port: 3389 | Protocol: TCP | Purpose: Remote Desktop Protocol. Remote graphical access to Windows computers.