Dynamic IP and static IP are two commonly used concepts in the network, and they have some differences in IP address allocation and characteristics. A dynamic IP address is an IP address dynamically assigned to a computer or network device by the ISP through the DHCP protocol. Each time a device restarts, the ISP reassigns an IP address, so the device may not retain the same IP address as previously assigned. In contrast, a static IP address is a fixed IP address that is directly assigned to a computer or network device by the ISP service provider and does not change when the device is restarted.
The following are the differences and characteristics of dynamic IP and static IP:
1. Dynamic IP:
Assignment Mode: Dynamic IP addresses are dynamically assigned to devices using Dynamic Host Configuration Protocol (DHCP). Each time a device restarts or connects to a network, the DHCP server automatically assigns an available IP address to the device.
Variability: Due to the nature of dynamic assignment, dynamic IP addresses may change when the device is reconnected to the network. Each time a device is restarted, the ISP assigns a new IP address to the device, so the device does not maintain the same IP address as previously assigned.
Application scope: Dynamic IP addresses are usually suitable for general users to access the Internet, such as using a Modem (Modem), ADSL and other ways to connect to the Internet of personal computers. Most home and individual users use dynamic IP addresses to access the Internet.
Flexibility and scalability: The flexibility and scalability of dynamic IP addresses make network management easier. Instead of assigning a fixed IP address to each user, ISPs can assign IP addresses to users as needed. In this way, IP address resources can be used more efficiently.
Cost savings: Using dynamic IP addresses can save costs compared to static IP addresses. There is no additional cost for dynamic IP addresses, and most Internet service providers offer dynamic IP addresses to users as a standard service.
A dynamic IP address is dynamically assigned to a device through the DHCP protocol. It is flexible and scalable, suitable for general users to surf the Internet, and at no additional cost. However, due to the variable nature of IP addresses, dynamic IP addresses may not be suitable for some specific applications, such as remote access, server hosting, and other scenarios that require a stable IP connection. When selecting an IP address type, users should weigh the advantages and disadvantages according to their own needs and application scenarios, and communicate with the ISP to obtain the most suitable solution.
2. Static IP:
Assignment Mode: A static IP address is a fixed IP address directly assigned to a device by an Internet service provider (ISP). When the device is started, the ISP assigns the same IP address to the device and it always stays the same.
Stability: Compared with dynamic IP addresses, static IP addresses are stable. They do not change when the device is started and always maintain the same IP address. This makes static IP addresses ideal for applications that require stable connections, such as remote access, hosted servers, and so on.
Scope of application: Static IP addresses are usually used for specific servers or computers with dedicated Internet access. Business users often require static IP addresses to support their business needs, such as setting up websites, hosting mail servers, remote monitoring, and more.
Management and accessibility: Static IP addresses are easier to manage and access. Because of its fixed nature, users can directly access the device or service through the specified IP address without paying attention to IP address changes. This is important for devices that need to provide external services or perform specific configurations.
Costs: Obtaining static IP addresses usually requires additional costs because they require more resources to allocate and manage. The exact cost will vary depending on your ISP's policies and service plans.
Static IP addresses are fixed IP addresses directly assigned to devices by ISPs, which have the advantages of stability and accessibility. It is suitable for scenarios that require stable connections and specific configurations, such as server hosting, remote access and other business applications. However, obtaining a static IP address usually requires an additional cost, and for the average user to access the Internet, a dynamic IP address is sufficient to meet the needs. When choosing an IP address type, users should consider the application needs and budget, and consult with the ISP to obtain the most appropriate solution.