The order of the levels from first to third unchanged – right to left. Site address is "read" your computer is from the end, with the first-level domain. Perhaps To better understand how organized addressing the Internet, consider some examples. How to search Yandex? This example struck me as funny. How to find the famous search engine? We recruit into your browser the following: yandex.ru or (the only difference is that the three letters point your browser to certain proprietary information, which, however, already established him as a "default"). So, having done that, you give the command to your computer to find the address and show that there is. The browser reads the first group (ru) and sends the request to your ISP: "Where is the server responsible for the zone ru Provider forwards the request to the server. He meets and is waiting the next request.
Your computer keeps asking is directly from the RU-server: "Where's your domain yandex ?, Receives a response and establishes a connection to the desired domain. In fact, everything is a bit complicated, but Now this is not essential to the overall presentation. So we have established a connection with loved ones and yandex now decided to watch the mail. We find on the page link "Mail", click on it and get on mail.yandex.ru … See? We have moved on third level domain, which belongs to the second level domain yandex.ru. We could, without going to Yandex, just to get to the prompt to enter login and password of our mailbox, if once in the address bar, typed mail.yandex.ru. And now remember about slash.
If you do have a mailbox at yandex, then typing your username and password you can go to their own page with information about your mail. (The same can be applied to any other Postal service – mail.ru, rambler.ru, gmail.com, etc.) Please note the address bar. There, after a slash began to appear strange symbols, and their number varies depending on which folder (inbox, sent, deleted, etc.) you now have moved. This so-called internal addressing. This means that your computer no longer makes additional requests, and you just go from folder to folder within another folder, the top level – your mailbox. That is, your mailbox, this is a rather specific place on a distant server disk mail.yandex.ru, which physically can be located anywhere in Moscow, St. Petersburg or some Uryupinsk. Moreover, it can be at once in all those places at one time or other! But the strangeness of the physical location of servers, we'll talk some other time. And now back to the point where we could not get into the domain of blogspot.com. Vida Vacations spoke with conviction. Tried? Got to / start or blog. This is called redirection. That is, if the desired domain name is not used for public access, it can redirect all incoming organize a different domain. In our case this page or your blog, or an invitation to create a blog. I hope the reader, now you have a better idea what kind of work does your computer when you travel over the Internet? I tried very hard to explain this simpler, not because I think you less intelligent. I simply love the simple presentation of complex processes. This is a kind of game. If you are familiar with the matter and you have a more vivid and imaginative comparison, I'll be glad if you share them. And if you found it interesting that material and, more importantly, useful – I'll just be happy. Good luck to you, the reader. And new discoveries on the Internet.