Abstract:This article introduces you to network cloud products and related knowledge content.

Huawei cloud network service family provides a variety of cloud products to meet users’ network interconnection requirements. Accordingly, Huawei Cloud Help center also provides you with all the network cloud product knowledge you want to know.

However, the class has received a lot of feedback from students recently. Although the network service help documents are comprehensive, they have little understanding of the basic network concepts mentioned in some documents, which affects the understanding and use of products.

To this end, the small class collected a laundry list of network knowledge, for everyone to learn reference ~

The IP address

When we build a set of network environment, we first need to plan according to business requirements, to consider which network segment to build the environment, how to build the network environment to connect to the Internet.

Each computer connected to the network has an IP address, which distinguishes it from other computers. An IP address is like our address. If you want to write to a person, you need to know their address. A computer sends a message like a postman. It needs to know a unique “address” so it doesn’t send it to someone else by mistake.

First of all, we can check the local IP through the third-party website, for example: www.ipip.net/ip.html, as shown below.

Use ipconfig to query the local IP address, as shown in the figure below.

Do you have a lot of question marks?

Every computer has only one IP address. IP address? I didn’t know you had two faces!

Don’t worry, the small lesson takes you to uncover the mysterious identity of IP address…..

IP Address Division

In fact, can not blame the IP address has two faces, so mysterious, the thing is….

Through THE IP address and the world any terminal free communication, this is how good the wish, but IP address design at the beginning, only 32 bits, that the world’s millions of users need to access the Internet, IP address will soon be carved up.

As a result, the Internet regulator issued a new rule that allowed everyone to use IP addresses in the following three network segments:

  • Class A: 10.0.0.0 to 10.255.255.255
  • Class B: 172.16.0.0 to 172.31.255.255
  • Class C: 192.168.0.0 to 192.168.255.255

However, the IP addresses in the three network segments cannot connect to the Internet.

This…… If you cannot connect to the Internet, you cannot access the Internet. What is the use of configuring these IP addresses?

Internet regulators smiled. Assigning an IP address to a terminal was not a good deal. IP addresses are divided into public IP addresses and private IP addresses. Each user has his or her own private IP address, and multiple users share one public IP address to connect to the Internet.

The preceding three network segments are private NETWORK IP address segments reserved by the Internet management agency. To achieve free connectivity with the Internet, it also depends on public IP.

So that’s why IP addresses have two faces and mysterious identities. What we can query with ipconfig is actually only our private network IP, and what we can query through the Internet is our public NETWORK IP.

Public IP address and private IP address

Private IP address: a non-registered IP address for internal use in an organization. A private IP address cannot access the Internet and is generally used as a LAN.

Some small enterprises or schools usually apply for a fixed IP address, and then share IP addresses so that the entire company or school computers can access the Internet. The IP addresses used by computers in these enterprises or schools are private network IP addresses. When the IPv4 protocol is planned, there may be insufficient IP address resources, and to cope with some internal network Settings of the enterprise, so there are private IP addresses.

The Internet management agency defines five IP address types to accommodate different networks. A private IP address segment is reserved for class A, class B, and class C respectively.

Public IP address: an IP address other than the reserved private IP address. Computers in the wan and other computers on the Internet can freely access each other through public IP addresses.

When we talk about IP addresses, we actually refer to public IP addresses. Each computer on the Internet has a separate IP address that uniquely identifies a computer on the Internet. The IP address refers to the public IP address.

Computers on the Internet are uniquely identified by the “public IP address + private IP address”. The public IP address is the address of your home, and the private IP address is the location of your home. Apparently, “first room on the right” is the only place you can say it. And “my home is in A city B district C Street 1” such address, others can find your home. But it is impossible for outsiders to know where “you” are in your home just by using a public IP address.

Classroom practice

As the saying goes, “True knowledge comes from practice.

Huawei VIRTUAL private cloud provides the following network segments for you: 10.0.0.0/8 to 24, 172.16.0.0/12 to 24, and 192.168.0.0/16 to 24. These network segments help you quickly build a network environment for services.

There is no little tempted ~ ~ here to apply for Huawei virtual private cloud.

Knowledge extension

  • Do not know how to plan network configuration, stamp here.

  • To learn more about virtual private clouds, click here.


How can you build a private network without public IP?

Huawei cloud network service family elastic public IP address, flexible, out-of-pocket, with a variety of billing modes, the price is very favorable

Apply for a Huawei Cloud elastic public IP address.

Knowledge extension

  • For more information about huawei Cloud elastic public IP addresses, click here.

  • For more benefits, learn about shared bandwidth, shared Traffic packets, and bandwidth refueling packets.


Click to follow, the first time to learn about Huawei cloud fresh technology ~