Regarding the computer IP, which is the IP address of the computer

Because the IP address space is insufficient, it is impossible for telecommunications to assign a public IP address to each user, so there are many ways to use experimental addresses, that is, many conversion technologies are used to solve the problem of IP addresses, such as: a school may have tens of thousands of computers, but the current IPv4 address can not be allocated so much, so you can use NAT technology to convert the intranet address or the experimental address into the address of the public network, and some use the address pool. In this way, from the outside world, it is one of those public network addresses, and the general Internet café often has only 1-2 addresses, so after the conversion, it is always that address, and the current IP address in China is charged 100 yuan for 1 month, so that the Internet café may use less IP address nearby.

An internet café is a local area network.

There are different IPs internally, but these IPs cannot be used on the Internet, and can only communicate within the local area network.

There is only one IP for the Internet café to the outside world.

So you're an IP to the outside world

You can go to the Internet and find a ** software.

Then you can use a different IP.

Don't do bad things).

The LAN in the Internet café has a confidentiality agreement, and they use different IPs for their own communication, but in the process of connecting with the external network, only a virtual IP is used, which can be understood as fake, so as to protect the communication security of the Internet café and reduce the probability of attack.

The Internet café is a local area network, all the machines go to the Internet through the gateway, and for the public network, the IP of the gateway is used to transmit information, and the gateway then transmits the information to the machines in the network.

There is only one Internet café public IP address, and of course there is only one one displayed (this is the effect of the same Internet café).

Method 1: In the win10 system, select the wireless network connected to the machine, right-click the properties, and then turn to the bottom in the pop-up settings, you can see the IP address of the machine.

Method 2: 1, hold win+r to run, enter cmd, click OK, enter ipconfig in the command letter and knock on the car, you can see the IP address at the bottom.

<> Method 3: <>

Method 4: <>

Check the IP address.

1. Enter [IPContv All] to display the IP address of the machine;

2. Use the key combination [Win] + [R] to bring up [Run], enter cmd car, and open [Command Prompt].

3. Enter [ipconfig all] in the command prompt, the IPv4 address displayed in it is the IP address of the machine, of course, this is the router IP address obtained by using the router.

IP protocol. There is a very important content in it, that is, every computer and other device on the Internet is given a unique address, called "IP address", so what is the purpose of the IP address of the computer?

1. Just as each user has a unique number in the world, every computer in the Internet also has a single address. In order for information to be transmitted accurately and quickly across the Internet to its destination, every computer connected to the Internet must have a unique address.

2. The address specified for each computer is a set of numbers, called an Internet address or IP address. Through the IP address, Duan Chunxian can accurately find a computer connected to the Internet.

3. An IP address consists of four decimal places, for example, an IP address.

Categories: Computer Network >> Computer Knowledge.

Concept When two computers connected to a network communicate with each other, the packets they transmit contain certain additional information, which is the address of the computer that sent the data and the address of the computer that received the data. When there is IP protocol-based communication in the network, these addresses that send and receive data are IP addresses.

Basic address format.

Today's IP networks use 32-bit addresses, expressed in dotted decimal systems, such as: The address format is: IP address = network address host address or IP address = host address subnet address host address.

IP address type.

When the Internet was first designed, each IP address included two identifiers (IDs), namely the network ID and the host ID, in order to facilitate addressing and hierarchical construction of the network. All hosts on the same physical network use the same network ID, and a host on the network (including workstations, servers, and routers on the network) has a host ID corresponding to it. IP addresses are divided into 5 types according to network IDs: Class A address, Class B address, Class C address, Class D address, and Class E address.

1 Class A IP address.

A Class A IP address consists of a 1-byte network address and a 3-byte host address, with the highest bit of the network address must be "0" and the address range is from to. There are 126 Class A networks available, each capable of accommodating more than 100 million hosts.

2 Class B IP addresses.

A Class B IP address consists of a 2-byte network address and a 2-byte host address, with the highest digit of the network address having to be "10" and the address range from to to. There are 16,382 Class B networks available, each capable of accommodating more than 60,000 hosts.

3 Class C IP addresses.

A Class C IP address consists of a 3-byte network address and a 1-byte host address, and the highest bit of the network address must be "110". There are more than 2.09 million networks ranging from to class, and each network can accommodate 254 hosts.

4 Class D addresses are used for multicasting.

The first byte of a Class D IP address starts with "LL0", which is a specifically reserved address. It does not point to a specific network, and is currently used for multicasting. A multicast address is used to address a group of computers at a time, and it identifies a group of computers that share the same protocol.

5 Class E IP addresses.

Start with "llll0" and reserve it for future use.

The all-zero ("0 0 0 0") address corresponds to the current host. The IP address of all "1" ("255 255 255 255") is the broadcast address of the current subnet.

Dual-machine interconnection, if there is no problem with the physical connection, the IP address only needs to be in the same IP segment (that is, the IP address can be set in the same IP segment).