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This article mainly introduces the main functions of the IP address, the article is very detailed, has a certain reference value, interested friends must read it!

The main functions of IP address: 1, use IP address to identify the host of Internet; 2, match IP address and MAC address, ARP protocol; 3, distinguish the special address assigned by hundreds of millions of hosts; 4, P address literally, it has the function of location.

This article operating environment: Windows7 system, Dell G3 computer.

The main functions of the IP address are:

1. Use IP address to identify the host of Internet

In each IP Datagram, the source IP address and destination IP address are carried to identify the source and destination hosts of the IP Datagram. During the transmission of IP Datagram, each intermediate node (IP gateway) also needs to choose the appropriate forwarding path (that is, route) from the source host to the destination host. The IP protocol can forward the IP Datagram according to the routing information provided by the routing protocol until it reaches the destination host.

2. The matching of IP address and MAC address, ARP protocol.

The data link layer uses MAC addresses to send data frames, so when actually sending IP messages, it is also necessary to match IP addresses and MAC addresses, which is completed by ARP (address Resolution Protocol) in the TCP/IP protocol suite.

3. Distinguish the special addresses assigned by hundreds of millions of hosts, so his main role is to distinguish between different hosts.

4. IP address literally, it has the function of location, its location principle depends on its allocation principle, IP address query is based on this.

Extended data:

IP address Typ

1. Public address

The public address (Public address) is the responsibility of Inter NIC (Internet Network Information Center Internet Information Center). These IP addresses are assigned to organizations that register and apply to Inter NIC. Access the Internet directly through it.

2. Private address

Private addresses (Private address) are unregistered addresses and are intended for use within the organization. Including: class A 10.0.0.0 murmur10.255.255.255, Class B 172.16.0.0murmur172.31.255.255, Category C 192.168.0.0Murray 192.168.255.255.

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