Which is the IP address in the network connection details

<>This is clear enough, and it's all very clear before.

1. Each IP address is composed of two parts: network number + host number. In this sense, an IP address is a hierarchical address structure.

Benefits of grading:

A. When the IP address management agency assigns the IP address, it only assigns the network number, and the remaining host number is assigned by the unit that obtains the network number. This makes it easy to manage;

b. The router is only grouped according to the network number connected to the destination host (the host number is not allowed to be considered), so that the number of items in the routing table can be greatly reduced, thereby reducing the memory occupied by the routing table, and checking the time used to find the route.

2. In fact, an IP address is used to identify the interface of a host or a router or a link. When a host is connected to two networks at the same time (e.g., a lab's server).

The host must have two corresponding IP addresses, which means that it must have two NICs.

3. The switch is a device at the data link layer, and the hosts connected to it still belong to the same network. The hosts of different LANs must be connected through routers due to different network numbers.

4. All network numbers are equal.

First of all, let's clarify what an IP address is. IP address is a unified address format provided by the IP protocol, which assigns a logical address to every network and each host on the Internet to mask the difference in physical addresses. This can be understood as the same as the **number in life, a person has a mobile phone, but the mobile phone needs a **number to call**.

An IP address is similar to a ** number.

So, what's the use of knowing an IP address? Through the IP address, you can query the real-life attribution. This is a bit similar to the attribution query of a mobile phone number. Through a certain IP address, you can query the telecommunications of a certain province and a certain city.

In addition to being able to query the attribution, you can also know the classification of the IP address. Which of a, b, c, d, and e does it belong to? These five categories are used in different fields, for example, Class A is generally used for large enterprises.

In this way, if we know that this IP address is of a certain type and know the place of ownership, then we can further lock the user.

In addition, you can also know whether the IP address is a public IP address or a private IP address by using the IP address.

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).

The meaning of the representative of IP is as follows:

1. IP is.

intellectual

The abbreviation of property, refers to:

A protocol for interconnection between networks.

Public addresses are used in the Internet and can be accessed at will in the Internet. Private addresses can only be used in the internal network, only through them.

**Server.

in order to communicate with the Internet.

2. It means intellectual property (full name:

intellectual

property

Right), abbreviated as IP.

3. The IP address is like the ** number (

4. Produced by any manufacturer.

Computer systems, which can be interconnected to the Internet as long as they comply with the IP protocol. IP addresses are unique and can be divided into 5 categories depending on the nature of the user. In addition, IP also has the meaning of entry protection, intellectual property, pointer registers, etc.

Network address. It is uniformly assigned by the Internet authority (Internic) in order to ensure the global uniqueness of network addresses.

Host address. is made up of individual networks.

System administrator.

Assignment. Therefore, the uniqueness of the network address is related to the network within the network.

Host address. The uniqueness ensures that the IP address is globally unique.

Extended Information: Fixed IP &

Dynamic IP is basically the product of the growth of a large number of network companies, for example, if you apply to China Telecom for a business model.

adsl line, then he will give you a fixed entity.

ip, this entity.

IP is called fixed.

ip up. And if you are applying for the timed system.

adsl, that's because of yours.

The IP may be shared by dozens of people, so every time you turn it back on to surf the Internet, you're on this computer.

None of the IPs will be fixed! Hence the name "dynamic".

IP or Floating IP. Basically, both of these are physical IPs, it's just that the methods used by the web company to assign them to users have different names that come with different names!

Encyclopedia. -ip

A protocol for interconnection between networks.