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Web Hosting - DNS, How The Internet Keeps Track of Names
The way computers communicate is, in a way, very similar to something very familiar: the postal system that delivers letters and packages. Here's how...
The Internet is just what the name suggests, a large inter-connected set of networks. But those networks are pointless without the one part that forms what is called their 'end-nodes', otherwise known as computers. Those computers often need to share information because the people who use them want to share information.
But, in a system where there are millions of separate computers, how can you enable them all to communicate? One very important feature of that solution is performed by something called DNS, the Domain Name System.
Every part of a network that is going to send or receive information is assigned an IP address. That's a numeric identifier that uniquely specifies a particular 'node', such as a computer, a router that directs traffic or other component. They look like this: 209.131.36.158
But those numbers are more difficult for people to remember and work with. They also aren't very attractive from a marketing perspective. So, a naming system was layered on top of some of them, mostly the computers involved, though routers have names, too.
But once you have a system that associates a unique IP address to a given name, you need some way of keeping track of all of them. That's carried out by several different pieces of the system: Name Registrars, DNS Servers and other components.
The Name Registrars, overseen by IANA (Internet Assigned Numbers Authority) and other international bodies, provide and keep track of domain names. When you register with GoDaddy or any of a hundred other intermediate companies, ultimately that information makes its way into a number of specialized databases stored inside DNS Servers.
A DNS Server is the hardware and/or software that tracks and forwards the IP Address/Domain Name pair from one place to the next. In many cases, there are a number of them between your browser and the remote computer you want to share information with.
Suppose you request information from, say, Yahoo's site by clicking on a link on their site. DNS resolves (translates) the name of WHO IS making the request and OF WHOM, to addresses, then passes the request through the network to the requested IP address. The requested data is then passed back through the mesh of network components to your computer and displayed in your browser.
Whether the communication is between a desktop computer and a server somewhere, or between one server and another, the process is essentially the same. DNS servers translate names into IP addresses and the requests for data are forwarded on.
In some cases those DNS servers are part of a specialized network computer whose sole job is to do the translation and forwarding. In other cases the DNS software may reside on a server that also houses a database of general data, or stores email, or performs other functions.
But however complicated the chain or the parts, the basic process is simple. Translate the name to an address, just as the postal system does. Whether international or local, your name is associated with an address, and the deliveries are made to the address, then forwarded to a particular name.
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So go ahead and surf the web page to get up to date with newest baby information. Copyright Infringement Lawsuit Who are in Copyright Infringement Lawsuits? A copyright infringement lawsuit can be brought down for any number of reasons: someone using a song in a podcast or radio program, a writer ‘borrowing’ information from another work, the copying of video or mp3 off the internet without permission (or sometimes, even to another CD or DVD). Copyright infringement lawsuits are not generally brought to the average person, unless they’re downloading a LOT of music or movies, but usually for large operations: software pirates reselling goods on eBay or to some other unsuspecting victim, someone ‘sampling’ a song to make another, or maybe a person reselling mp3s online. When you understand the implications of it, copyright infringement lawsuits aren’t frivolous as some people may make it seem. For the most part, the average person’s familiarity with a copyright infringement lawsuit is taking down copyrighted material after receiving a nasty email. The use of works that are used in major record albums my major recording stars like Britney Spears or 50 Cent, people will begin copyright infringement lawsuits for songs that bear resemblance to another song. Usually these suits will be lost because it’s rather hard to prove inspiration, but they are rather costly and draining, especially if there isn’t a large backing legal team. Copyright infringement lawsuits for large enterprises can be rather costly and time consuming as well. If you work for someone, and you plagiarize someone on the company blog, the whole company can be sued, and you fired, for that infraction. Another large copyright infringement lawsuit is the eminent MySpace v. Universal Music Group, who is claiming that MySpace is knowingly committing copyright infringement by allowing it’s users to upload copyrighted material. Even then, Universal Music Group has been negotiating with MySpace and couldn’t come to an agreement – then they filed suit. Universal Music Group has an agreement in place with YouTube, where YouTube agrees to follow Universal’s rules. It’s worked out well thus far, and I think with an agreement in place ‘user created content’ will retain a destination on the internet. This is a testament we all need to be with social networking sites and ‘user created content.’ We need to watch ourselves, because many times we may not realize the veracity of our actions. Sometimes, people break copyright laws on purpose. There is a huge market in the dealings of pirated software – from Windows to Photoshop to The Sims. It’s very easy to share peer-to-peer, and because of that, people can resell ‘pirated’ for a high price – all profit. 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The lawsuits help us to understand what is, and what isn’t fair – and these organizations have helped the masses to understand what’s so important about copyright, and why we need to defend our freedom of speech. |