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Web Hosting - The Internet and How It Works
In one sense, detailing the statement in the title would require at least a book. In another sense, it can't be fully explained at all, since there's no central authority that designs or implements the highly distributed entity called The Internet.
But the basics can certainly be outlined, simply and briefly. And it's in the interest of any novice web site owner to have some idea of how their tree fits into that gigantic forest, full of complex paths, that is called the Internet.
The analogy to a forest is not far off. Every computer is a single plant, sometimes a little bush sometimes a mighty tree. A percentage, to be sure, are weeds we could do without. In networking terminology, the individual plants are called 'nodes' and each one has a domain name and IP address. Connecting those nodes are paths.
The Internet, taken in total, is just the collection of all those plants and the pieces that allow for their interconnections - all the nodes and the paths between them.
Servers and clients (desktop computers, laptops, PDAs, cell phones and more) make up the most visible parts of the Internet. They store information and programs that make the data accessible. But behind the scenes there are vitally important components - both hardware and software - that make the entire mesh possible and useful.
Though there's no single central authority, database, or computer that creates the World Wide Web, it's nonetheless true that not all computers are equal. There is a hierarchy. That hierarchy starts with a tree with many branches: the domain system.
Designators like .com, .net, .org, and so forth are familiar to everyone now. Those basic names are stored inside a relatively small number of specialized systems maintained by a few non-profit organizations. They form something called the TLD, the Top Level Domains. From there, company networks and others form what are called the Second Level Domains, such as Microsoft.com.
That's further sub-divided into www.Microsoft.com which is, technically, a sub-domain but is sometimes mis-named 'a host' or a domain. A host is the name for one specific computer. That host name may or may not be, for example, 'www' and usually isn't. The domain is the name without the 'www' in front. Finally, at the bottom of the pyramid, are the individual hosts (usually servers) that provide actual information and the means to share it.
Those hosts (along with other hardware and software that enable communication, such as routers) form a network. The set of all those networks taken together is the physical aspect of the Internet.
There are less obvious aspects, too, that are essential. When you click on a URL (Uniform Resource Locator, such as http://www.microsoft.com) on a web page, your browser sends a request through the Internet to connect and get data. That request, and the data that is returned from the request, is divided up into packets (chunks of data wrapped in routing and control information).
That's one of the reasons you will often see your web page getting painted on the screen one section at a time. When the packets take too long to get where they're supposed to go, that's a 'timeout'. Suppose you request a set of names that are stored in a database. Those names, let's suppose get stored in order. But the packets they get shoved into for delivery can arrive at your computer in any order. They're then reassembled and displayed.
All those packets can be directed to the proper place because they're associated with a specified IP address, a numeric identifier that designates a host (a computer that 'hosts' data). But those numbers are hard to remember and work with, so names are layered on top, the so-called domain names we started out discussing.
Imagine the postal system (the Internet). Each home (domain name) has an address (IP address). Those who live in them (programs) send and receive letters (packets). The letters contain news (database data, email messages, images) that's of interest to the residents.
The Internet is very much the same.
Save the Earth and Get Free Stuff from Recycling with Freecycle Get ready to become more earth-conscious by freecycling. What is freecyling and how can it help the environment? As the name implies, the concept of freecycling is directly inspired by the idea of recycling. Freecycling is not only a great way to help protect the earth's natural resources and prevent the flooding of landfills, it is also a great and viable way to find goods and services that you really need. Thus, freecycling is a very practical approach to many of the problems that we face today. What is the Freecycle Network? Freecyling has found a home at freecylce.org. The Freecycle website is home to the Freecycle network. This network is made up of over 4,000 groups with a total member population of over four million people worldwide. The freecycle philosophy is spreading like wildfire as more and more people come to learn more about this exciting and environmentally friendly new exchange network. The Freecycle Network represents an entirely grassroots, nonprofit effort that allows people to get and give their stuff fro free in their own cities and towns. Freecycle allows all the good stuff that would normally end up in a landfill in the hands of someone who can really use it. A local volunteer who is in charge of coordinating the freecycling efforts and awareness in their own community moderates almost each local freecycle group. Membership to join the Freecycle Network is absolutely free and open to anyone with something to give, or get. In order to join the Freecycle Network today, simply find your local community by searching in the search box. The Ins and Outs of Freecycling for the Freecyling Newbie No freecycling is not a new, cutting edge sport—it is an easy way to manage one's owns possessions so that you leave a smaller footprint on the Earth. If you are new to freecycling, perhaps you could use a little guidance on how to get into the freecycling side of things. Here are some things you need to know before you get started in the exciting world of freecycling. Take the Right Kinds of Precautions When Freecycling One of the most important things you should do is to always make sure to freecycle safely. Freecycling often means coming into direct contact with seemingly perfect strangers. You should always maintain your safety and privacy when interacting with other members of your freecycling group. If you do not know someone well, avoid giving out your personal contact information right away. Whenever possible, try to make exchanges in a public setting or at least make sure that you are not alone with picking up or waiting for someone to pick up the item that is being freecycled. Tips and Hints for Using the Freecylce List What happens once you has signed up to become a part of your local freecycling group? Once you have successfully joined, you can use your local freecycling list to communicate with other members. You can post a message, read messages and send email to your local groups collective address. Most local freecycling groups use local yahoo groups to communicate. To send an email to the list, simply send an email to your local groups email address. If for some reason you wish to unsubscribe to your local freecyling group, you simply need to send an email to the unsubscribe address that is listed at the bottom of each email from your local freecycling group. For information on posting, replying or reading messages to your local yahoo group, visit your local group and become familiar with the delivery options. If you have any questions, contact your group's moderator directly. Copyright law Understanding Copyright Law Copyright law is a set of laws that is used to regulate things such as movies, plays, poems, musical compositions, drawings, paintings, sculptures, software, photographs, sculptures, literary works, choreographic works, radio broadcasts, televisions broadcasts and more. Copyright law is only regulated to cover the manner or form in which the information or material is expressed. For instance, it does not cover the idea or facts which are represented in a work. In instances where a copyright does not exist, patents or trademarks may be in place which can impose legal restrictions. Copyright law states that the holder of the copyright has the right to make copies or reproduce the work to sell. They can also export or import the work, create derivative or adaptation of the original work, display or perform the work publicly and assign or sell the rights to someone else. Copyright law is set up to protect people from having someone do something with their copyrighted work or material. Someone that has a copyright may choose to exploit their copyrighted work, or they may choose not to. Many people debate whether copyright law and copyrights are moral rights or merely property rights. It is important to note that in the U.S. copyright law covers protection for published and unpublished works. Copyright law protection covers a work from the time it is created in a tangible form. The author or creator of the work immediately holds the copyright to the work and it is the property of the author or creator. No one else can claim copyright to it, unless the original copyright holder (the author or creator) gives or sells the rights to another person. Many people fail to understand that merely owning or possessing a work does not give them the copyright to it. Just because you have ownership of a copyrighted work does not mean that you own the copyright. Likewise, if you copy someone’s work and list their name on it, you are undertaking copyright infringement. Many people also fail to understand when copyright protection is secured. The moment a work is written or created and it is in physical tangible form or recorded it falls under copyright law. While it is recommended to register your work through the Copyright Office, if your work is not registered and someone steals your work, they have violated your copyright. Using a copyright notice is not required by law. However, many recommended that the copyright notice or symbol be used so remind the general public that the piece is under copyright. Anything that is created after 1977 is protected by copyright law for the lifetime of the author of the creator, plus an additional 70 years after the creator’s death. The public domain is a good source of information that is no longer under a copyright or work that was never under a copyright to begin with. Virtually all works that were created or published in the United States prior to 1923 are said to be in the public domain. Things that can be found in the public domain that are free of copyright law generally include generic facts and information, works that have a lapse in their copyrights (this encompasses works that were created prior to 1978) and materials and information put out by the United States government. In addition, you may find works in the public domain that are free of copyright law because it has been dedicated to the public domain. |