The Internet is a bottomless ocean filled with millions of terabytes of information. Every day, people upload to the Internet a lot of videos, pictures, documents and other content that can be easily retrieved even after many years.
All information that can be seen on a particular site is stored on servers — specialized computers equipped with a large amount of memory. They process, store and serve the existing content to the user. The unit works autonomously, without direct human participation.
The content itself is accumulated on ordinary hard drives — hard drives. Whenever a person clicks on the desired site, the computer first turns to the DNS server, which looks for the desired ip-address by the domain name and allows you to open the site of interest.
The farther the user is from such a server, the longer the request goes to him. The speed of the Internet depends on this — the server response time. The lower it is, the faster we receive information.
The server network is the Internet
Data centers operate on a commercial basis: they rent out space on their hard drives. Thus, you can create a website, information from which will be accumulated on a rented server or a small part of it.
Large organizations such as banks, search engines, advanced internet portals, etc. build their own storage facilities. For example, this is what the Yandex campaign does, which has built its own data centers in several countries at once.
At the same time, search engines often index the data of all registered sites. It happens that information on a certain site is deleted for any reason, and Yandex can proudly declare: «I saved it!»
The work of the storage facilities is strictly regulated. Data centers are provided with electricity without interruption. Sudden power outages are backed up by diesel generators and flywheels — inertial batteries in the form of massive rotating wheels.
The storages are equipped with modern fire extinguishing and cooling systems. During operation, hard drives and servers generate heat and therefore tend to overheat. To prevent this from happening, excess heat is removed using air conditioners and ventilation.
Thus, all information accumulated on the Internet is located in data centers.