![]() ![]() The loopback addresses that start with 127 are an exception here, however, because they are blocked for assignment and are used exclusively for local applications. IP addresses are used on the Internet to uniquely identify devices or web servers. This shows how many files were transferred and how long the transfer took. Speed testing: By pinging the localhost, system administrators can test the performance of the computer or local system.This file can be used to redirect malicious websites to the local server to prevent access to the malicious web server. Before the Domain Name Server, the so-called host file was used to translate IP addresses into URLs and vice versa. These are then no longer accessible when entered into the browser. However, it can also be used to block websites that contain harmful content or even viruses. Blocking websites: Nowadays, the localhost is primarily used to test applications.Then it can be found out whether all functionalities work as desired. The application can be executed on the localhost and tested by the local user. Testing: When developing applications and websites that are to communicate via the Internet at a later date, it makes sense to test them locally first.In practice, there are many applications where it may be useful to use localhost. This ensures that the connection is not established via the Internet, but via the local network. However, the IP address that the computer has on the Internet is not used, but the so-called loopback address 127.0.0.1. The localhost is used to establish a connection with the own device. Each segment can have a numerical value between 0 and the hexadecimal number FFFF. An IPv6 address, on the other hand, is somewhat more complex and consists of eight so-called segments separated by colons. The number range of IPv4 is simply no longer sufficient to provide a unique IP address for all new websites and users.Ī classic IPv4 address consists of four numbers from the value range between 0 and 255, separated by dots, e.g. 185.30.32.18.Īs the number of registered websites on the Internet continues to increase, a distinction is now made between IPv4 and IPv6 addresses, which differ primarily in their length and possible number combinations. When we enter “into the browser, the Domain Name Server translates it into the correct IP address of the web server, i.e. The so-called Domain Name Server (DNS) ensures that we as users do not have to learn these IP addresses by heart, but can use the much simpler URLs. Google offers the possibility to find out the own IP address by the search phrase “What is my IP address?”.Įvery web server that provides a website also has such an IP address, so that it can be addressed specifically. You can imagine it simplified like addresses or telephone numbers on the Internet. IP is an abbreviation for “Internet Protocol” and enables the requested or sent data packets to arrive at the correct location. If you already know the concept, feel free to skip to the next chapter.Īs soon as we are on the Internet with a device, we receive a so-called IP address. Before we can go deeper into the topic of localhost and its applications, it makes sense to understand how our computer normally communicates with the Internet and how IP addresses work.
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