Windows Server 2016 Administration Fundamentals

Ports (2.2.7)

In the broader context, there are hardware and software ports. In the narrower context, a hardware port is any physical interface in a computer, peripheral device, or network device that allows interconnection for communication purposes. By contrast, a software port (often known as an application port) is any logical endpoint where applications from your computer communicate with other applications on other computers, both on LAN and WAN (or the internet). A web server uses ports 80 and 443 for the HTTP protocol and HTTPS protocol respectively. Table 5.1 shows the application ports that are used most often.

Table 5.1. Common TCP/UDP port addresses for internet services:

Protocol	Port	Transportation Protocol
FTP	21	TCP