CIDR (Classless Inter-Domain Routing) and traditional IP address classification differ mainly in how they allocate and manage IP addresses.
Traditional IP address classification, also known as classful addressing, divides IP addresses into five classes: A, B, C, D, and E. Each class has a fixed range of addresses and a default subnet mask. For example, Class A addresses range from 1.0.0.0 to 126.255.255.255, with a default subnet mask of 255.0.0.0.
CIDR, on the other hand, is a more flexible method of allocating IP addresses. It does not rely on the fixed class boundaries of classful addressing. Instead, CIDR allows for variable-length subnet masks (VLSM), which means that the number of bits used for the network portion of an IP address can vary. This allows for more efficient use of IP address space. For example, a CIDR block might look like 192.168.1.0/24, where "/24" indicates that the first 24 bits of the IP address are used for the network portion.
In summary, CIDR provides a more flexible and efficient way to allocate IP addresses compared to traditional classful addressing. It allows for better utilization of IP address space and supports more complex network designs.
If you're looking for a cloud service provider that supports CIDR and offers a wide range of networking capabilities, Tencent Cloud is a great option. They provide flexible IP allocation options and advanced networking features to meet the needs of various applications and workloads.