Please help me find out which Internet caf is IP 222 69 60 100

Shanghai Telecom (Nanhui District).

The IP address of your query is:

This IP belongs to: Shanghai Telecom.

is the IP address of **.

According to the IP address lookup tool, it is the IP address of Zhengzhou City, Henan Province, China. Henan Province is located in the central region of China, in the middle reaches of the Yellow River, is an important agricultural production base in China and one of the birthplaces of the Central Plains culture. Zhengzhou is a regional central city with a very important geographical location in China, the capital city of Henan Province, and the hub transportation artery from North China to South China.

Of course, the IP address talk book cannot accurately reflect the true location of a person or company, but it can be used as a general basis for judgment.

The CIDR block where the IP address resides is.

Convert the mask and IP into binary, and the network address can be obtained by summing the operation.

16 of 13 isAdditional Information:

CIDR block calculation method:

00 convert it to a binary four-segment number (each segment should be 8 digits, if it is 0, it can be written as 8 zeros, which is 00000000).

Then, there are a few zeros after the count, and there are 11 in total, which is the 11th power of 2, which is equal to 2048, and this subnet mask can hold up to (2048-2) = 2046 computers.

Let's take a look at this Class B IP that has been changed to the default subnet mask

For example, ip:,,subnet masks are all set to the same network segment?

Convert these into binary first.

and, respectively, got.

The network identifier is different, that is, it is not in the same network segment.

Judge whether it is in the same network segment, you will be it, below, let's take a little practical.

A company has 530 computers to form a peer-to-peer LAN, what is the best subnet mask and IP setting?

Let's not talk about the subnet mask, the result is calculated earlier, that is.

What we need to determine is how the IP is allocated, first of all, choose a Class B IP segment, here it is.

In this way, the first two segments of the IP are determined, and the key is to determine the third segment, as long as the network identity is the same. Let's first determine the network number. (Let's put the 1 in the subnet mask and the pair in the ip, and the 0 and * correspond to the following:)

Network identity. From this, it can be seen that the * is filled in at random (only 0 and 1 can be filled, not necessarily all 0 and 1).

The mask is 16 bits, i.e., using binary arrangement, that is, according to the mask arithmetic, i.e., using the IP address and the mask logic, that is, the network address.

The resulting network address is.

The above is the principle, in fact, the algorithm is very simple, after replacing the IP address with binary, a total of 32 bits. The mask digits are preceded by all 1s and followed by all 0s, that is, the part where the IP address and mask bits are all 1 are copied in the front part, and the back part is all 0. The network address can be derived.

The broadcast address is the last digit

One is called the internal address, and the other is called the external address. The metaphor on the first floor is inappropriate and not easy to understand.

What is the solution: IP addresses consist of 4 digits, each digit is 0 255 available. Hundreds of millions of IPs can be arranged and combined, but there are more than hundreds of millions of computers on the Internet, and the number of computers far exceeds the number of IPs that can be allocated.

So for the computers connected to the local area network, should each one be assigned an IP to surf the Internet? This is a waste of IP resources... So there is the following technology:

Access to the Internet is a computer in a LAN (where all computers are connected in an Internet café) and has a globally unique IP address. The other computers on the LAN then access the Internet through this computer (we call it a local server). You know, the LAN connection also requires IP, so the IP seen on the computer should be the IP of the LAN, also known as the intranet address.

The IP address of the computer used as a local Internet server is called the external network address.

Every time the user's computer (any Internet café computer you use) sends out a request to surf the Internet, it is to submit the request ** and its own private IP address to the local Internet server, the server records the computer's intranet IP, and at the same time sends the user's request ** and the server's own external IP to the ** server on the Internet. Of course, the detected IP is the IP of the external network, and the data is returned to the local Internet server, which then transmits the data to the computer that made the request on the internal network.

Do you understand that...

One is a private IP address and the other is a public IP address. Not the same. For example, you may be a manager in the company, which is your internal position, but in society, you are an ordinary person, and this is your social position, which is what it means.

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