Is there a pattern to IP addresses 150

I'm just going to say what I think about IP, which is divided into shared and private.

First of all, you said that you see that many local IPs are almost the same problem, these IPs are their own separately built LAN IP addresses, which belong to private addresses, and everyone can use them within their own scope. What you see the most is definitely that you can use it when you build a local area network, and you can also use it when someone else builds a local area network. Because they are all separate LANs, they are not in conflict.

Then the common address is the IP address on Intel, just like an IP address of your organization, and this IP address on the Intel network represents your organization. And this is the only one, your unit uses this address, and other units can't use it.

For what the 4 digits mean, the 4 digits represent the network ID and the host ID. This is a bit annoying to explain, and it has to do with the subnet mask.

Is there a certain pattern to IP, if so, tell me What do the four sets of data represent?

I suggest you check out the relevant basic books, I don't know how to say it, so I won't talk about it.

32-bit binary, 1 for network bits and 0 for local bits. Subnet masks are used to distinguish between network bits and native bits. It is divided into five categories: A, B, C, D, and E.

For example, class A refers to: 0nnnnnnnnn--host--host--host that is, from to, and class B refers to:

10nnnnnn--network--host--host is reached, class C refers to 110nnnnn--network--network--host, and class D refers to 110nnnnn--multicast group--multicast group--multicast group

Class E addresses are used for scientific research.

If you don't understand, you can send me a message, I've been configuring the network recently.

There are three basic types of IP addresses, which are represented by the first set of digits of the network number.

The first set of numbers for a category A address is 1,126. (Note that the digits 0 and 127 are not Class A addresses, the digits 127 are reserved for the internal loopback function, and the digits 0 indicate that the address is a local host and cannot be delivered.) ）

The first set of numbers for category B addresses is 128,191.

The first set of numbers for category C addresses is 192,223.

IP address addressing scheme: The IP address addressing scheme divides the IP address space into five categories: A, B, C, D, and E, of which A, B, and C are the basic classes, and D and E are used as multicast and retained.

IPv4 has 4 segments, each with a maximum of 255. Due to the vigorous development of the Internet, the demand for IP addresses is increasing, which makes the issuance of IP addresses more and more stringent, and various data show that all IPv4 addresses in the world may be issued between 2005 and 2010 (in fact, the IPv4 bit address allocation was completed on February 3, 2011).

IP stipulates that all devices on the network must have a unique IP address, just like the recipient's address must be indicated on the mail so that the postman can deliver the mail. Similarly, each IP packet must contain the IP address of the destination device in order for the packet to be properly delivered to its destination. The same device cannot have multiple IP addresses, and all network devices that use IP addresses must have at least one unique IP address.

Be. IP address. Each branch he uses on the Internet is unique, and there will not be two identical addresses, because the public address is the responsibility and assignment of the public address.

Therefore, the address is recorded when it is used. It is possible to identify a specific device by address. In the intranet, the private address can also be determined to a certain device.

This problem may be caused by the user's current version being too low, resulting in the inconsistency between the address displayed on the Peixiang page and the actual address.

For example, Bill Gates's IP address is displayed in Henan, Apple's president Tim Cook's IP address is displayed in Shanghai, and a series of controversial address displays. Spring ruler.

The CIDR prefix length indicates the mask length of the IPv4 address and ranges from 1 to 32. An IP address with a mask length of less than 8 is an illegal address, and an IP address with a CIDR prefix length is a network-wide broadcast address. Dear, according to the above basis to judge the IP address, the cluster state to judge whether it is legitimate<>

Seepage source.

IP is the abbreviation of Internet Protocol in English, which means "protocol for interconnection between networks", that is, a protocol designed for computer networks to connect with each other for communication. In the Internet, it is a set of rules that enable all computer networks connected to the Internet to communicate with each other, and prescribe the rules that computers should follow when communicating on the Internet. Any computer system manufactured by any manufacturer can be interconnected with the Internet as long as it complies with the IP protocol.

It is thanks to the IP protocol that the Internet has rapidly developed into the world's largest open computer communication network. Therefore, the IP protocol can also be called the "Internet Protocol IP is the abbreviation of the English Internet Protocol", which means "the protocol for interconnection between networks", that is, the protocol designed for computer networks to connect with each other for communication. In the Internet, it is a set of rules that enable all computer networks connected to the Internet to communicate with each other, and prescribe the rules that computers should follow when communicating on the Internet.

Any computer system manufactured by any manufacturer can be interconnected with the Internet as long as it complies with the IP protocol. It is thanks to the IP protocol that the Internet has rapidly developed into the world's largest open computer communication network. Therefore, the IP protocol can also be called the "Internet Protocol".

An IP address is a 32-bit binary number that is usually split into 4 "8-bit binary numbers" (i.e. 4 bytes). IP addresses are usually expressed in the form of "dot decimal", where a, b, c, d are decimal integers between 0 and 255. Example:

The dotted decimal IP address (, which is actually a 32-bit binary number (.

Differentiating methods. Public address.

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

Private address. A private address is a non-registered address that is intended for internal use within an organization.

The following is a list of retained internal private addresses.

Class A, Class B, Class C.

1.Sometimes, our computer seems to have obtained an IP address, but it cannot access the Internet. At this time, it is necessary to see if the IP address obtained by our computer is the correct IP address that can be used to surf the Internet.

2.Computers, networks.

Then click on "Ethernet" in the pop-up window or your wireless wifi connection

Click the "Details" button in the pop-up dialog box:

Step 2: Determine the validity of the IP address.

The IP address is 4 3-digit numbers"."separated strings;

Each of the 3 digits must be between 0 255 (inclusive), otherwise it is illegal;

One of the most common unavailable (also called illegal IPs) is:

4.To determine an IP address, you need to know the parameters between IP ranges.

Answer the legal steps to determine the IP address: 1. First understand what the IP address is, and the IP address is divided into Class A, Class B, Class C, Class D, and Class E. The IP address range for Class A is, Class B is, and Class C is.

2.Then judge the length of the ID card. In Class A IP addresses, the length of the network ID is 8 bits, the length of the host ID is 24 bits, and the subnet mask is class, which is suitable for medium-sized networks with a network ID length of 16 bits, a host ID length of 16 bits, and a subnet mask.

Class C is suitable for small LANs with a network identity length of 24 bits, a host ID length of 8 bits, and a subnet mask.

3.Finally, judge whether it is legitimate. Out of each legitimate IP address, there are four that start with "."

3 separate digits, each between 0 and 255, including 255. I believe that after studying, we already know how to tell if an IP address is legitimate.

The first decimal range of Class A addresses.

The first decimal range of Class B addresses.

The first decimal range of Class C addresses.

Class 223D and Class E for multicast and commercial use.

The above addresses are public addresses, except for the following private network addresses and the addresses that start with loopback test 127.

Class A, Class B, Class C.