Ports And Protocols

Front 1

HTTP

Back 1

Hypertext Transfer Protocol.
Used by Web servers to access and
deliver information across the Internet between Web servers and Web browsers.
Uses port 80.

Front 2

FTP

Back 2

File Transfer Protocol.
Used by file servers to transfer files over the Internet.
Uses port 20 (data transfer) & port 21 (command channel).

Front 3

POP

Back 3

Post Office Protocol.
Used to receive email from an email server.
Uses port 110.

Front 4

SMTP

Back 4

Simple Mail Transfer Protocol.
Used by email servers to route email between email servers.
Uses port 25.

Front 5

TELNET

Back 5

Terminal Emulation Protocol.
Allows a client to connect to a server remotely and interact with the server as if they were actually sitting at the server machine.
Uses port 23.

Front 6

HTTPS

Back 6

Hypertext Transfer Protocol over SSL.
uses SSL (Secure Socket Layer) to encrypt and decrypt Web page information for secure transfers over the Internet.
Uses port 443.

Front 7

Well-Known Ports

Back 7

Associated with common network applications.
Ports 1~1,023.

Front 8

Registered Ports

Back 8

Ports used by organizations to register specific applications like Instant Messaging or VPN.
Ports 1,024~49,151.

Front 9

Private Ports

Back 9

Ports that are often used by source ports and are not normally assigned to applications.
Ports 49,152~65,535.