Subnet Mask and Internet Protocol Address play a crucial role in network communication, as they together define how devices in the network communicate with each other and the network range to which they belong.

IP address

An IP address is a numerical label used to uniquely identify each device on a network. The most widely used version of IPv4 addresses consists of 32-bit binary numbers, usually divided into four groups of eight bits each, separated by dots. Each group is represented by a decimal number ranging from 0 to 255. For example, 192.168.1.1 is an IPv4 address.

Subnet mask

The subnet mask is used to divide an IP address into a network part and a host part. The subnet mask is also a 32-bit binary number, usually represented in dotted decimal notation. A 1 in the subnet mask represents the network part, and a 0 represents the host part. For example, 255.255.255.0 is a common subnet mask, which indicates that the first 24 bits are the network part and the last 8 bits are the host part.

relationship

·Define network scope: The subnet mask is used to determine the network portion of an IP address by performing a logical AND operation with the IP address. This helps determine which devices belong to the same network or subnet.
Broadcast and routing: The network part determines how packets are routed to the target network, while the host part is used to identify specific devices within the target network. Broadcast messages such as ARP requests are sent to all devices within the same network, that is, addresses with a subnet mask defined as all 1s in the host part.
Subnetting: By changing the subnet mask, a large network can be divided into multiple smaller subnets without changing the network part of the IP address, which helps to manage network resources more effectively and reduce the size of the broadcast domain.
IP address classification: Although modern networks use CIDR classless inter-domain routing to represent the combination of IP addresses and subnet masks, traditional A, B, and C network divisions are still based on different default subnet masks, such as the default subnet mask for Class A networks being 255.0.0.0, Class B being 255.255.0.0, and Class C being 255.255.255.0.
The relationship between subnet mask and IP address is inseparable, and together they define how devices in the network recognize and communicate with each other. By configuring subnet mask appropriately, network performance and security can be optimized.

When setting the IP address for the 4G LTE router, it is important to note the following key points to ensure the accuracy and stability of the network configuration:

I. Ensure that the IP address range matches

Avoid conflicts: The IP address set should match the IP address range of the network to avoid IP address conflicts. This usually means understanding the current IP address allocation of the network to ensure that the newly set IP address is not within the range already in use.
Subnet Mask Matching: The subnet mask should match the IP address to correctly divide the network and host parts. This helps determine which devices belong to the same subnet and allows data packets to be routed correctly through the network.
Choosing the appropriate IP address type
Static IP and dynamic IP: Choose the appropriate IP address type based on actual needs. Static IP addresses are fixed and suitable for devices that require stable connections, while dynamic IP addresses may change over time and are suitable for temporary connections or mobile devices.
Private IP and public IP: In the internal network, private IP addresses such as 192.168.x.x and 10.x.x.x are usually used to avoid conflicts with public addresses. When communicating with external networks, it is necessary to use public IP addresses or convert private IP addresses to public IP addresses through NAT network address translation technology.

III. Specific steps for setting IP address

·Log in to the management interface: First, you need to log in to the management interface of the 4G LTE router through a browser. This usually involves entering the default IP address, username, and password of the router.
Network configuration: In the management interface, find the network configuration or interface management options, and enter the IP address setting interface.
Configure IP address: Set appropriate parameters such as IP address, subnet mask, and gateway according to actual needs. If you use a static IP address, you need to manually enter this information. If you use a dynamic IP address such as DHCP, you need to ensure that the router has enabled the DHCP service and allow the device to automatically obtain an IP address.

IV. Safety and Stability Considerations

Password setting: When setting the IP address, it is also necessary to set a strong password to protect the router's management interface from unauthorized access. It is recommended to use a complex password that includes uppercase and lowercase letters, numbers, and special characters, and to change the password regularly to ensure security.
Stability test: After setting the IP address, it is recommended to conduct a network stability test to ensure that the device can connect to the network and communicate normally. This can be done using ping commands, network speed measurement tools, and other methods.

V. Reference documents and support

Consult the instruction manual: Before setting the IP address, consult the user manual or online help document for the corresponding 4g lte router model on the PUSR official website to understand the specific setup steps and precautions.
Contact technical support: If you encounter problems or are unsure how to operate during the setup process, you can contact the technical support team of PUSR 4g lte router or related service providers for assistance.
When setting up the IP address for the 4G LTE router, it's important to match the IP address range, choose the appropriate IP address type, follow specific setup steps, consider security and stability, and refer to relevant documentation and support. These considerations will help ensure the accuracy and stability of the network configuration.