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🗣 Wd提问: ip v4

🤖 Ai回答:
IPv4 (Internet Protocol version 4) is the fourth version of the Internet Protocol (IP), which is the primary protocol for data communication on the Internet、Here are some key points about IPv4:

1、Address format: IPv4 uses a 32-bit address, typically represented as four decimal numbers separated by periods (e.g., 192.0.2.1).

2、Address space: This provides approximately 4.3 billion unique addresses (2^32).

3、Classes: IPv4 addresses are divided into five classes (A, B, C, D, and E) based on the first few bits of the address.

4、Subnetting: Allows for the division of a network into smaller subnetworks.

5、Limited address space: Due to the rapid growth of the Internet, the IPv4 address space is nearly exhausted.

6、Network addressing: Includes public and private address ranges.

7、Routing: Uses classless inter-domain routing (CIDR) for more efficient routing.

8、Security: IPv4 includes basic security features like IPsec.

9、Transition: Many networks are transitioning to IPv6 due to address space limitations.

10、Legacy support: Despite the move to IPv6, IPv4 remains widely used and supported.

11、Applications: Used in various networking applications, including the Internet, local area networks, and wide area networks.

12、Protocols: Works in conjunction with other protocols like TCP, UDP, and ICMP.

IPv4 has been the foundation of the Internet for decades, but its limitations have led to the development and gradual adoption of IPv6 as a successor protocol.

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