What Is the Internet Assigned Numbers Authority?

The Internet Assigned Numbers Authority (IANA) is an Internet addressing agency that manages IP addresses, domain names, and many other parameters used in the Internet. The day-to-day responsibility for the assignment of IP addresses, autonomous system members, and many top-level and second-level domain names rests with the International Internet Registry (IR) and regional registries. IANA is administered by ICANN.

Internet Assigned Numbers Authority

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The Internet Assigned Numbers Authority (IANA) is an Internet address assignment agency that manages IP addresses, domain names, and many other parameters used in the Internet.

The Internet Assigned Numbers Authority (IANA) is the organization responsible for coordinating some Internet operations. At the same time, because the Internet has become a global

Internet Assigned Numbers Authority is

The Internet Assigned Numbers Authority is the Internet Assigned Numbers Authority. Responsible for IP address allocation planning and port definition for TCP / UDP public services. The Internet Agency Membership Authority (IANA) is the governing body for IP addresses, domain names, and many other parameters used in the Internet. The day-to-day responsibility for the assignment of IP addresses, autonomous system members, and many top-level and second-level domain names rests with the International Internet Registry (IR) and regional registries.

Within the range of IP addresses, the non-routing address Internet Assigned Numbers Authority reserves some of the addresses as private IP address spaces, which are used exclusively for internal LAN use. These addresses are as follows:

Class IP Address Range Networks

A 10.0.0.0 --- 10.255.255.255 (length is equivalent to 1 Class A IP address)

B 172.16.0.0 --- 172.31.255.255 (length equivalent to 16 consecutive Class B IP addresses)

C 192.168.0.0 --- 192.168.255.255 (length equivalent to 256 consecutive Class C IP addresses)

These addresses will not be assigned by the Internet, so they will never be routed on the Internet. Although they cannot be directly connected to the Internet, they can still be used to communicate with the Internet. We can choose the appropriate address as needed. Class, boldly use these addresses as public IP addresses in the internal LAN. On the Internet, those devices that do not need to communicate with the Internet, such as printers and manageable hubs, can also use these addresses to save IP address resources.

Special IP address

Just like each of us has an ID number, every computer on the network (more precisely, the network interface of every device) has an IP address to identify itself. We may all know that these addresses consist of four bytes, which are represented in dotted decimal notation and their A, B, and C classifications, etc. However, among the total of more than four billion available IP addresses, you know some of the following common Is there a special address? We together look:

First, 0.0.0.0

Strictly speaking, 0.0.0.0 is not a real IP address anymore. It represents a collection of all unclear hosts and destination networks. "Unclear" here means that there is no specific entry in the local routing table indicating how to reach it. For this machine, it is a "shelter", and all the "three no" personnel who are unknown to it are sent in. If you set the default gateway in the network settings, the Windows system will automatically generate a default route with a destination address of 0.0.0.0.

Second, 255.255.255.255

Restrict broadcast addresses. For this machine, this address refers to all hosts in this network segment (same broadcast domain). If translated into human language, it should look like this: "Everyone in this room is paying attention!" This address cannot be forwarded by a router.

Third, 127.0.0.1

Local address, mainly used for testing. In Chinese, it means "myself." On Windows, this address has an alias "Localhost". Addressing such an address cannot be sent to a network interface. Unless there is an error, there should never be a data packet with the destination address "127.0.0.1" on the transmission medium.

Fourth, 224.0.0.1

Multicast address, notice the difference between it and broadcast. These addresses are from 224.0.0.0 to 239.255.255.255. 224.0.0.1 refers to all hosts, 224.0.0.2 refers to all routers. Such addresses are mostly used for specific programs and multimedia programs. If your host has the IRDP (Internet Routing Discovery Protocol, using multicast function) feature enabled, then your host routing table should have such a route.

Five, 169.254.xx

If your host uses the DHCP function to obtain an IP address automatically, then when your DHCP server fails, or the response time is too long to exceed a system prescribed time, the Windows system will assign you such an address. If you find that your host IP address is an address like this, unfortunately, in most cases, your network is not working properly.

Six, 10.xxx, 172.16.xx ~ 172.31.xx, 192.168.xx

Private addresses. These addresses are widely used in corporate internal networks. Some broadband routers also use 192.168.1.1 as the default address. Private networks may use arbitrary IP addresses because they are not interconnected to the outside. Such addresses are reserved for their use in order to avoid address confusion when they access the public network in the future. When a private network using a private address accesses the Internet, it uses address translation (NAT) to translate the private address into a public legal address. Such addresses cannot appear on the Internet.

For a host on a network, there are three types of legitimate destination network addresses that it can normally receive: its own IP address, broadcast address, and multicast address.