Welcome to elreno.org
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.
Get Free Healthcare Items through the GSK Company Website Ready for the best in free healthcare items? If so, turn to the GSK company website for your share of healthcare freebies. GSK is an acronym for the GlaxoSmithKline Company, which is a major manufacturer of many healthcare and personal care products and items. If you are a fan of this manufacturer, or you simply wish you had access to more affordable health and personal care items, you will be glad to know that this company often runs special promotions. The company's special promotion often includes discount coupons and free samples. Some of their most popular offers include a handy $20 coupon book, as well as free samples of their most popular products, including Tums. What You Have to Do to Gat Access to GSK Special Offers If you are interested in getting access to the best of GSK special offers, here are some hints and tips so that you always get the free personal and health care items you desire. First, you should know that the GSK healthcare company is host to a special site where you can keep track of all their special offers and promotions. The GSK healthcare site is known as HealthySpecials.com. As the name indicates, this is a website dedicated solely to the special promotions that are being ran by the GSK company at any given time. Get to know this website, and a good idea is to bookmark it for easy future reference. When you get to the website, click on any of the deals or promotions. A special details window will open from the login page. If you are having trouble viewing these promotions, make sure that your Internet surfing preferences is set so that you allow pop-up windows. If you are not seeing the details of the promotions, there is a good chance that you have turned on pop-up blocking. Also, you will need an account to access some of the deals and promotions. If you don't have an account, simply click on the setup link and fill out the whole registration form. This should not take long, and it will allow you easier access to all the promotions on the website. Understanding the Availability of GSK Special Promotions Once you become familiar with the special promotions on this website, you will find that the offers will come and go. However, there is nearly always at least one highly desirable promotion, such as a free sample or coupon offer. Most of the availability of these offers will be limited to the United States. Also, make sure you read all the details, as many coupons and offers carry overlapping expiration dates. Avoiding Risks When Choosing GSK Special Offers and Promotions Are there any risks associated with actively seeking GSK offers and promotions? As with most Internet activity, there is always some risk involved in divulging your personal information. Never give out more personal information than you are comfortable giving. However, GSK is a well-known and respected company that offers visitors access to their privacy policy. Their privacy policy states that they will not share your personal information with partner companies or vendors. They ask for a phone number, but it is not required to take advantage of most offers. You will also be asked to enter your date of birth on the initial registration form. For the most part, you will not have to worry about privacy issues when dealing with this well-known and regarded company. However, always make sure that the company or website that you are dealing with offers you a look at their privacy policy. It is a bad sign if the company does not have any sort of privacy policy. As always, use your better judgment when releasing your personal contact information. The Makings of a Magazine: Do They Include You? (writing magazine articles) Magazines are everywhere. They are published on nearly every subject you can imagine, in duplicate and triplicate and more. All that a start-up magazine needs is a niche and an audience. While there may be hundreds of cooking magazines out there, a new one could come up if it should cover cooking for your pets. In fact, there may already be such a magazine in existence. The niche is cooking for pets. The audience is those people who want the healthiest foods for their pets and are willing to put the time and effort into making it for them. If you are interested in writing magazine articles, you’ll be sure to find one that is perfectly suited to your interests and abilities as a writer. Because there are so many magazines, it won’t be difficult to find one that you will enjoy becoming a part of. What You Should Know Magazines survive on advertising. The advertisers pay because the content is good enough that readers will invest in the glossy covers again and again. The best way to find a healthy magazine is to look through the racks for thick publications. They will only be full of content if they are full of advertisements. The big magazines can afford to pay their writers more, but they can also afford to pay only the best writers. Even though there is quite a lot of space to fill with content, you may have a hard time getting published in major magazines at first. Smaller magazines do not have quite the readership and so they also do not have quite the advertisement content. The space will be limited and the pay will be lower, but these magazines will be more open to new writing talent nonetheless. The More You Know, the Better When it comes to a writing career, the more you know the better off you will be. It is not hard to figure out that you will have the best chances for publication if you can write on a variety of topics. You should not limit yourself to a small area of expertise. Work to become an expert in every topic you come across. There is no possible way of course to be an expert in every area of human knowledge, but it will help you in writing magazine articles to learn every new piece of information that you can. For example, if you were to send a query to a health and fitness magazine about writing a short piece about general mountain biking tips they may accept it. They may also then request additional information about the pros and cons of using a road bike on mountain trails. If you only know about mountain bikes, you’ll be stuck. If you have worked on broadening your horizons though, you’ll be able to produce the work that the magazine editor requires. Getting On Staff Querying magazines is a way to get published, but if you need a more stable job, you may be interested in getting on staff with a magazine. Writing magazine articles is a talent. If you can consistently bring an editor what he is looking for, you might have a chance. To improve your chances, in addition to writing effectively, it will help to have some significant education behind you. If you are serious about making it to the masthead of your favorite magazine, it’s time to go to school. A degree will help your credibility as a writer and will help you open doors into the magazine publication world. Writing magazine articles takes a special kind of writer. You have to have a feel for what people are interested in reading about. The magazine content will help you understand how to write for a particular magazine and audience. You can also improve your chances of writing accepted articles by improving your knowledge base. Don’t be picky about what you’re willing to learn and you could go very far in the writing business. |