The structure of a typical IP telecommunications network can be divided into

The structure of a typical IP telecommunications network can be divided into backbone network, metropolitan area network and access network; IP is the abbreviation of Internet Protocol, which is the network layer protocol in the TCP/IP system; IP is the entire TCP/IP The core of the protocol family is also the foundation of the Internet.

The structure of a typical IP telecommunications network can be divided into backbone network, metropolitan area network, and access network.

IP is the abbreviation of Internet Protocol, which is the network layer protocol in the TCP/IP system. The purpose of designing IP is to improve the scalability of the network: first, to solve Internet problems and realize the interconnection of large-scale and heterogeneous networks; second, to separate the coupling relationship between top-level network applications and underlying network technologies to facilitate the two. Develop independently. According to the end-to-end design principle, IP only provides a connectionless, unreliable, best-effort datagram transmission service to the host.

IP is the core of the entire TCP/IP protocol suite and the foundation of the Internet. IP is located in the network layer of the TCP/IP model (equivalent to the network layer of the OSI model). The upper layer can carry information of various protocols in the transport layer, such as TCP, UDP, etc.; the lower layer can put IP information packets into the link layer. , transmitted through various technologies such as Ethernet and Token Ring networks.

In order to adapt to heterogeneous networks, IP emphasizes adaptability, simplicity and operability, and makes certain sacrifices in reliability. IP does not guarantee the delivery time and reliability of packets. The transmitted packets may be lost, duplicated, delayed or out of order.

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