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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.
Software copyright act The Software Copyright Act was a Great Step in the Right Direction The software copyright act, which is actually called the Digital Millennium Copyright Act has given software developers a little more power when it comes to protecting their works. If you've bought software in the last few years I'm sure you've noticed some of the changes that have been made in the software buying process. If not, then you really should wake up and take note. Some of the more noteworthy achievements of this act are the following: 1) It is now a crime to go around anti-piracy measures in software. 2) It is no longer legal to make, sale, or give away software or devices that were invented for the purpose of cracking codes enabling the illegal copying of software. 3) Limits the liability that ISPs (as far as copyright infringement violations) when information is transmitted online. The problem isn't the people want to be bad or do something wrong. Most of us by nature want to do the right thing. The problem lies in educating people to the fact that it really is stealing when you bootleg, pirate, illegally download, or otherwise acquire copies of software that you didn't pay for. It's one of those 'white lie' types of crimes for most people and they don't really see how it will hurt anyone for them to copy a game that their brother, cousin, uncle, or friend has. Someone paid for it after all. The problem is that at $50 plus being the average price for computer games and simple software if 10 million people are doing it, the numbers are staggering and they add up quickly. The software copyright act sought to protect businesses from losing money this way. The software copyright act was the worldwide response to a growing problem. This problem was so widespread with illegal downloading of music that lawsuits and massive commercial ad campaigns were initiated in order to curtail illegal downloading activities when it comes to music. It seems to be working to some degree. Fewer people are illegally downloading music; the downside is that these people aren't buying as much music either. The reason is because they are no longer being exposed to the wide variety of music and artists that they were getting freely when downloading music each night at no cost. This equals lower record sales and is becoming a problem of lower movie sales and software sales as well. People aren't trying new games like they could before the software copyright act by going to LAN parties and everyone sharing a copy to play, now everyone has to own a copy before they can play. While this may be great for the companies that make a few (a minimal few at best) extra sales on the games for the sake of a great party but for the most part, it is costing them the extra money that could be made by 10 people finding they liked the game enough to go out and buy it so they could play it whenever (and the next group of 10 they will introduce the game to) Gamers are a funny group and software copyright act or no, they are going to stick with the software and games that serve them best. The software copyright act was created in order to protect the rights of those writing and developing computer software. We want those who fill our lives with fun games, useful tools, and great ways to connect to friends and family to continue providing these great services and to get paid for the ones they've already provided. The software copyright act is one giant step in the right direction as far as I'm concerned. Free Baby Stuff Requires a Visit to Babies Online Babies online is the page on the Internet when it comes to free stuff for the baby and new parent. The page offers any parent resources about the growing baby. Anything from personalized weekly calendars, over calculators to articles and information can be found on this web page. All the information offered on the page is freely available to anybody who signs up for their free membership. Under the top pages offered by babies online are pages that contain links to other free baby web sites, fun birthday facts, a weekly pregnancy calendar, due date calculator, baby’s first year, baby photo contest, baby names and meanings, baby freebies and a baby’s online blog. These pages are visited by the most users and are also most frequently used by members of the page. All these pages offer information around pregnancy and the infancy. Some of the pages offer advice on many of the questions that parents have in their first year of parent hood or before during pregnancy. The baby pages section of the website offers anybody to have an online birth announcement for the newborn, to read other peoples birth announcement and even to create or read other women’s pregnancy journals. Anyone can create his or her own and then sent links to all their friends to show off their little one over cyberspace. Not only does this save the writing and buying of all those birth announcement cards, it also saves the stamps and printed pictures that generally are included in birth announcements. The freebies page offers users links to free baby websites, links to free baby product samples, free pregnancy wristbands, free photo prints, free baby coupons and even freebie alerts. The free baby’s web site section lets parents create a web page that is completely centered on their new addition and give the new parents a chance to share their precious with all their friends and family. In the free baby product sample section a parent can find anything from free magazine subscriptions to those famous parenting magazines, to formula samples and children’s books. Due to the ten year anniversary of the page the web site offers pregnant mothers a free pregnancy bracelet. It is not only sleek and fancy, but is also there to alert any doctors or other personnel of the mother’s pregnancy status in any kind of situation, such as fainting, unconsciousness or an accident. A link to a related photo-processing place offers free photos for parents. Shipping as well as the prints is free to anyone that signs up to receive this offer. The online photo page offers any of the services a local photo store or photo lab might offer. Cards, picture prints, enlargements, photo gifts, calendars and more can be bought from this online site additionally to the free prints. On the online babies coupons and sample page users can find links to good deals, links to coupons and links to free samples. This part of the page is sure worth checking out. Some of the deals are for baby gear and baby food, while others also have links to places that offer deals on toddler’s and younger children’s clothing items. Even if it is just the beginning of pregnancy, checking out what is available online; especially on babies online can have great advantages. Some of the links offer new parents and parents to be many samples of different formulas, if this is going to be the choices to feed the baby, parents have a chance to try the different formulas and additionally get coupons for their favorite one. Not just the coupons, but also the free tools and journals on the web page make it worth to check it out. So go ahead and surf the web page to get up to date with newest baby information. |