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Basically, the devices need to know somehow where they find data and thus how they find other devices.
Just like in real life, addresses, so-called IP addresses, will be used for this purpose in virtual space.IP stands for “Internet Protocol”. Protocol here means rules for communication on the Internet. Without rules, a meaningful communication would not be possible.
If you want to go to a friend, you also need to know the address first and then find a route to get there.
This is how it works for the computer.
However, for the computer, everything is zero and ones.More or less anyway.
If you move away from pure electronics, the next best approximation with which we humans can do something is the use of numbers and, based on them, letters.
For a long time, IP addresses of version 4 were used for communication on the Internet.Some of these are still used, but more in home networks. In the meantime, IP addresses of version 6 are spreading. This is because IPv4 simply no longer provides enough addresses for the increasing number of devices. The last free IPv4 address ranges were assigned in 2011.
In principle, this is actually like numbering the devices that follows a particular system.IPv4 addresses are 4 numbers between 0 and 255, which are separated by 3 points. In local and home networks, for example, typical addresses are:
IP addresses of version 4 now offer 4x 8 bits or a total of 32 bits at possible addresses.
Version 6 IP addresses have a standard length of 64 bits and a maximum length of 128 bits.Therefore, they are already given in hexadecimal numbers. For example:
While IPv4 addresses in the home network would still be reasonably manageable with a few devices, it would be extremely tedious to permanently use IPv6 addresses for various websites.
It would be tedious enough, for example, to call google.com 220.127.116.11 constantly.In the long run and with the mass of websites today, no one can remember this.
That’s why we humans have simplification in the form of URLs.And it is really nothing more than a simplification for us human beings. The addresses are still resolved in the background. And technically, it’s even more expensive. URL stands for “Uniform Resource Locator”. Literally translated, this means “single position pointer for resources”
That’s what makes it cumbersome enough with the amount of websites today.But google.com to the beip game is still much easier to remember than something like 2B78:37AB:395B:AFB7:2B78:37AB:395B:AFB7.
In addition, it allows a categorization on the basis of human logic and thus a certain logic and the subject matter to be limited.This in turn allows conclusions to be drawn about the content and topics and makes it even easier to find relevant resources.
It should be noted that “www.” is often mistakenly regarded by ignorant people as a necessary part of an address.”www” stands for “worldwide web”. So for a worldwide network or internet for short.
This is actually an outdated prefix to show the type of service.Specifically, the service area for websites. And the type of service here means, in return for example FTP or NNTP.
The domain names that are considered URLs are categorized from back to front and forwards are subcategories.
For example, for a .com domain, the top level domain, i.e. the highest category is the .com domain itself.
The individual Web pages that are associated with this domain or category are child areas.In the case of Google, the google domain would be a subdivision to the .com area.Just like many other websites associated with the .com top-level domain. For example, facebook.com, wikipedia.com , or quora.com.These are all subordinate sands of the main area .com
The same applies to www!In fact, www. so-called subdomain. Technically, this is no longer the main area itself. Technically, therefore, google.com and www.google.com are two different areas.Where the subdomain www is a child area of the main domain google.com and usually belongs to the owner of the main domain, unless used for other services and passed on to users.And Google in particular makes this clear with various services such as trends.google.com or translate.google.com!
So it’s conceivable:
- .com is the top-level domain
- fahrzeuge.com is the general area “Vehicles
- autos.fahrzeuge.com is a subordinate area where cars are specifically concerned
- as opposed to: motorrad.fahrzeuge.com
Not only that.In fact, addresses like www.trends.google.com would even be FALSE!Once again, www. another subcategorization, in this case the already subordinate domain trends.
At www.Address is actually a forwarding or redirect of the main domain. It is an outdated prefix and no longer common or necessary for most pages today.
In fact, in the age of increasing mobile devices and increasingly and ever-increasing addresses, it is even a DISADVANTAGE to still use this unnecessary extension of addresses!Leave www. away, there is simply a lot of unnecessary typing work.
Disclaimer: various examples such as IP addresses and URLs were invented.More or less. In any case, these are only accidental examples.