Welcome to www.bloghaus.net

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.

Highlights for Free Stuff for Educators Everybody knows that teachers work hard for little monetary compensation. Fortunately, there are many fine resources available that allow educators access to free stuff. Who deserves free stuff more than our teachers? If you are a teacher searching for the best of what the web's freebies, here are some places that offer freebies just for educators. Teaching Education Aid Available for Free There are many websites on the World Wide Web that offer totally free educational and teaching aids. If you teach younger students, you can find great coloring pages. You can also find several teaching aids, including alphabetical pages. Why spend money on expensive preprinted alphabets? You can gain easy access to your own free alphabet pages. Print them out, color them and seal them to make them last. This is an easy way to put together very elemental packets and gain access to fun activity pages. There are many fine teacher resources available for free on the World Wide Web. Here are even more resources for finding great and free resources for educators of all stripes. Getting Access to Free DVDS for Educators Did you know that you could get access to free educational DVDs? Izzit.org offers you a free DVD on your birthday (or another day of your choosing). This offer is limited to teachers of grades 6-12. This website also offers educators discounts on educational DVDs as well as coupons for free ice cream. Gaining Free Nutrition Educational Materials If you are an educator seeking out free nutritional materials, you are in luck. The Dole Corporation is currently offering free educational materials to teachers. Their 5 a Day program offers free downloadable teaching materials. You can also request professional teaching materials by using mail and fax. Simply request your free nutritional materials on your school's official letterhead. Free Computer Tools for Educators If you need access to free teacher tools, Microsoft Office has got you covered. Microsoft is currently offering free learning essentials that can help you create handouts, compose tests, and make presentations and other educational content. You will need a registered copy of Microsoft Office 2002 or 2003 that runs on Windows XP and Windows 2000. Need Teaching Aids for Your Classroom? If you are looking for free teaching visual aids, there are many nonprofits that can provide you with such aids. The Human Genome Project offers educators free posters. Although this promotion is directed specifically to educators, anyone can take advantage of this great offer. The National Institute of Drug Abuse also offers free visual teaching aids. These are great to hang in the classroom. You can order multiple copies directly form the National Institute on Drug Abuse. The USEPA is another organization that offers educators a variety of free posters, as well as other teaching materials, including activity books, CD-ROMs, lesson plans and more. Keep Your Classroom Safe With Free Cleaning Aids Keeping the classroom clean is one of the biggest challenges of any educator. The Clorox Company is trying to make it easier on teachers by offering them a free "Clean Up the Classroom" multimedia kit aimed specifically at classroom educators. The free kit comes loaded with a poster, a cleaning guide and DVD. You will also get a free canister of handy Clorox Disinfecting Wipes. Get Free Magazine Subscription Offers Educators have access to many free magazine subscription offers. Yes Magazine is offering educators a free one-year subscription. This is a magazine published by the Positive Futures Network. This is non-profit organization that helps promote social change to a more compassionate and sustainable world. Take advantage by contacting the magazine for your free educator subscription.

Software copyright Software Copyright Difficult to Enforce For those of you who love computer games, you probably know more about software copyright than you ever thought you'd want to know-especially if you have or have ever owned multiple computers. Most new games not only come with special copyrights but also built in security features that are designed to enforce those copyrights. Some have even gone so far as selling you the right to 'use' the material you are purchasing rather than providing you with actual ownership of the software to which they own the software copyright. That bothered me a bit at first, but I've come to understand it's another way of protecting them and their rights as well as controlling or limiting how you use the software they provide. Software copyright is actually quite confusing and hotly debated. Many stores will not accept opened software as returns because the software companies won't reimburse them for the product and they are left holding the bag. It doesn't sound like much but when you think of literally thousands of consumers attempting to return opened software because they didn't like or worse, they only needed to download and install it for it to actually run. Companies that produce computer software have become savvy to the ways of the modern consumer. Those companies that produce computer games especially require that the disk actually be in your player in order for the game to operate properly. This enforced the software copyright to the extent that two people can't reasonably share ownership of the same game, as they both need an actual disk in order to operate the games. But for every solution there is a hacker or budding programmer that creates a new problem for software makers and holders of software copyright to face. One of the latest problems is the virtual CD. The long and short of this is that the computer is tricked into 'seeing' the CD where it should be and carries out the game as though it were. Another important thing to note about software copyright is that there are many programs available that mimic some of the more notable applications for no fee. These are often referred to as open source software and often have excellent if not superior quality to similar programs that are available for fees. One thing I've noticed is that I will often find free open source software, download it, love it and a few months later I will find a more polished version of the same software, by the same company available with a few more bells and whistles for a fee. The new improved software has a software copyright and is not free to consumers but it is also a much better version than what I currently have. It's a great way for new software developers to make names for themselves and get volunteers for the testing process of their development phase. A software copyright offers protection and recognition to the owner of the software. The problem with protecting software is that it is impossible to police properly. That would require walking into every home on the planet and checking each computer to make sure there are no duplicate copies extra copies, illegal copies, etc. Plus, who keeps the actual boxes from all their software? I certainly do not. I could never prove that I was honoring the software copyright if the packaging or receipts were the only way I have of doing so. Most people in the world today honestly want to do the right thing. Software is one of the most expensive purchases people will often make for their home computers, it only makes sense to buy actual copies that have an actual software copyright in order to protect your investment not only in your software but also in your computer.