First, the steps to open the port:
1. First open the control panel of the computer, and then find the firewall in the control panel.
2. Select and click Advanced Settings to the left of Firewall Settings.
3. In the advanced security settings, we click to select the inbound rule on the left.
4. Select and click New Rule in the right column.
5. Rule Type Select the port type.
6. Select tcp protocol and specify a specific port, such as 4444.
7. When to apply the rule, all are selected by default.
8. After exiting, we will see the inbound rule created, which is allowed by this port.
Second, the port classification:
1, hardware port
CPU transmits data with peripherals through interface registers or special circuits (called ports).
The ports in the hardware field are also called interfaces, such as parallel ports and serial ports.
2. Network ports
In network technology, ports have several meanings. The ports of hubs, switches and routers refer to the interfaces connecting other network devices, such as RJ-45 port and serial port. The port we are talking about here is not a physical port, but a port in TCP/IP protocol, which is a logical port.
3. Software port
Buffer.