Network+ Common TCP and UDP Ports

Front

Kerberos

Back

UDP 88 – A secure authentication protocol used to verify identities over a network.

Front

Port for Apple Filing Protocol (AFP)?

Back

548 – Used by Apple devices to share files over a local network.

Front

Port for Domain Name System (DNS)?

Back

UDP 53 – Translates website names (like google.com) into IP addresses.

Front

Port for File Transfer Protocol (FTP)?

Back

TCP 20 and 21 – Used to upload and download files from servers.

Front

Port for HyperText Transfer Protocol (HTTP)?

Back

TCP 80 – Allows users to access and view websites.

Front

Port for HyperText Transfer Protocol Secure (HTTPS)?

Back

TCP 443 – Secures website access with encryption.

Front

Port for Internet Message Access Protocol (IMAP)?

Back

TCP 143 – Lets you access email messages on a mail server from different devices.

Front

Port for Lightweight Directory Access Protocol (LDAP)?

Back

TCP/UDP 389 – Used to look up user or computer info on a network (like a digital phonebook).

Front

Port for Post Office Protocol version 3 (POP3)?

Back

TCP 110 – Downloads emails from the server to your device.

Front

Port for Remote Desktop Protocol (RDP)?

Back

TCP 3389 – Allows one computer to control another remotely.