A fixed IP address means that the IP address assigned to a device in the network is fixed. In contrast to a dynamic IP, a fixed IP allows the device to always maintain the same identity in the network, making it easier to manage and use.

When using a fixed IP address, you need to pay attention to the following points:

1. Confirm that the network supports fixed IP addresses

In some public networks, such as public WiFi, mobile data networks, etc., fixed IP addresses may not be supported. Therefore, before using a fixed IP, you need to confirm whether the network supports this function.

2. Avoid IP conflicts

In the same network, different devices using the same IP address will cause IP conflicts, thus affecting network connectivity. Therefore, when assigning a fixed IP address to a device, you need to avoid duplication with the IP addresses of other devices.

3. Confirm the gateway and DNS settings

When using a fixed IP address, you also need to confirm whether the gateway and DNS settings of the device are correct. The gateway is a bridge between the device and the external network, while the DNS is a service that converts domain names into IP addresses. If the gateway or DNS settings are incorrect, the device may not be able to connect to the network normally.

4. Confirm the subnet mask settings

The subnet mask is used to divide the IP address into two parts: the network address and the host address. When using a fixed IP address, you need to confirm whether the subnet mask of the device is set correctly. If the subnet mask is set incorrectly, the device may not be able to connect to the network normally.

5. Confirm the router settings

When using a fixed IP address, you also need to confirm whether the router settings are correct. The router is the core device in the network, responsible for transmitting data packets from one network to another. If the router settings are incorrect, the device may not be able to connect to the network normally.

In short, when using a fixed IP address, you need to carefully confirm whether the settings are correct to ensure that the device can connect to the network normally and avoid various problems.