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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.
Grocery Check ? Visit your Neighborhood Grocery Website for a Free Deal Page Are you looking for the best in grocery freebies? If so, get ready to reap the rewards of becoming a dedicated freebies hunter. It is said that there is no such thing as a free lunch, but if you are an avid freebie hunter, you will find that there is such a thing. Getting free groceries is one of the sweetest plumbs. Here are some hints and tips on how to get free groceries. Wouldn't it Be Great to Get Free Groceries? Yes! Of course, wouldn't we all want to get free groceries? Believe it or not, it is totally possible with a bit of creativity, ingenuity and planning. First, you must learn the art of creative couponing. What is creative couponing? It is exactly what it sounds like?you can use coupons to get some sweet grocery freebies. All you have to learn is how and where to use your grocery coupons. Here are some tips on using coupons to get free groceries. Watch Out for New Product Coupons New products are often heavily marketed with free or deeply discounted offers. Sign up for your grocery store's promotional newsletter or discount card program. This way, you will automatically receive discount coupons and freebie offers through the mail. Watch out for new products?these often come paired with new product coupons. You can often use new product coupons in order to match the sale price and get the time for free. You can use new product coupons to purchase food items, but they are often available for hygiene and beauty care products. Toothpaste, toothbrushes, shampoo and deodorant?all of these types of personal care products are constantly being revamped and marketed. Check the Clearance Aisle or Table at Your Local Grocery Store If you are an avid coupon clipper, there is a good chance that you already have a coupon stowed away for an item on the clearance aisle. Believe it or not, deeply discounted or marked down items are still eligible for coupons. Check out the clearance aisle in order to match your coupons with discounted items. There is a chance that you can get an item at a deeply discounted price, or yes, even for free. Seek Out Loss Leaders at Your Local Grocery Store What are loss leaders, and why can they be such good deals? Loss leaders are those items at your local grocery store that are currently selling at a loss. Loss leaders may vary from store to store, even when you are shopping at a chain store. Stores are often ready and willing to get rid of loss leaders. These items are often sold at a deeply discounted price. Be prepared to match these loss leaders with coupons in order to turn these products from cheap loss leaders to freebies. Don't Forget the Double Coupons Double coupons are the bread and butter of any motivated freebie hunter. Most grocery stores still honor double coupons, and some grocery stores even have promotional double coupons days. Search your store's ad circular and items for items that you can possible get for free by using double coupons. You will be amazed at how many grocery items you can get for free, or near-free, simply by taking advantage of double coupons. Don't Forget the Rebate! Rebate offers are another bread and butter strategy that you should employ if you are serious about finding free grocery items. Although you may not get an item for free right away, be patient and follow all the instructions offered by the manufacturer. After a few weeks, you should receive your rebate check in the mail. This is an easy way to make sure that you can get free grocery items.
Check Download.com for the Best Free Security Software Around With viruses, spyware, adware and hackers threatening on every corner of the internet, it is essential that especially internet users protect their PCs as best as they can to not loose their files or even their whole PC. Buying security software at a local computer store can be very expensive, but protecting the PC does not necessarily have to cost private persons anything at all. Just by checking what for example download.com has available, computer users might be able to save as much as 50-100 Dollars and still be able to protect their PCs adequately. One part of the web page called antivirus, firewall and spyware offers different links to downloads from companies that help protect PCs from any harm. Most of the programs offered on the web page are free for download. Some of the programs are antivirus software, which generally will scan the PC according to your settings for example once a day. When the software finds a virus in any of the files on the PC it will put out a virus alarm in form of a message box. The PC users then have to decide in which way the PC should be cleaned. Some antivirus software will offer to delete the file, others save it in what is called a virus vault, where the virus cannot attack other files on the PC, while others clean the file if it is cleanable. Other programs offered on the page are firewalls. Firewalls protect the Pc from any attacks form the internet, such as hackers hacking into your PC, Trojan horses, viruses and more entering the PC is not possible, when a firewall is used and set to the proper security setting. Using a firewall is a good idea for any PC, but it is important to know that the way the firewall works it might also cause a few problems with software on the Pc that enters the Internet. Therefore firewalls need to be configured right to have a smooth running and protected PC. Many of the firewalls offered on this page are free for download, but generally most PCs have a built in firewall in their operating system that just needs to be activated or configured. The third major kind of protection software one can download form this website is spy or ad-aware detection. Spy and ad-aware are programs that are malicious for the PC user. These kind of malicious little programs are installed without the users proper knowledge and intercept or partially take control of the interactions of the PC with the internet without the users consent. Spywares do not just monitor the internet interactions, as the name suggests, it also collects personal information, can install additional software that will take over the control of the browser activity, accessing websites that will allow for example viruses to enter the PC. Spyware is also often called privacy-invasive software and something a PC as well as a user needs to be protected from. The download page does not only offer many of these programs for free, it will also offer patches and update files for these programs. Even though many of the companies offer the continuous automatic update to protect a PC from new viruses and other malware, some PC users prefer not to have an automatic update and download their own updates whenever they deem necessary. Whichever way one likes to update the PC, it is most important of all to know that PCs need to be protected and users do not need to spend tons of money in order to do so. Free programs available for download on download.com will give a PC similar protection and keep files and identity safe.
Got Java on the Brain? Get Free Coffee Products! There are many wonderful web pages on the Internet that help their users and visitors to free products. Some of the pages hold links to free samples; others offer coupons and advice on how to get free products. If it is Java that is on ones mind and one is looking for free coffee products, there might just the right web page on the Internet for that. Finding pages that offer free java, is as easy as drinking a cup of coffee. Internet savvy persons just need to enter the words free coffee into any of the Internet search engines and a variety of great pages will pop up on the search screen. Coffee pages offer samples, links to samples, coupons and more on their sites. Any coffee lover has the chance to try a great variety of new and fancy coffees. The Internet pages that offer free coffee samples are updated frequently, so that links should not be outdated and new products are listed as soon as they appear on the market. As with so many pages on the Internet, these web sites rely on their users to help out with new sample tips, coupon tips and promotion dates. Users are asked to contact the web page master whenever there is a link that is not working, so that that link can be fixed or removed. Users are also encouraged to send in any data about free samples, links to company pages that offer free coffee and even links to coupons and deals that are unbeatable. Since free coffee is sometimes hard to get too and there are only that many free samples that coffee lovers can get a hold of, many of the free coffee sites also offer other great free deals and links to coupons and samples, so that it is anyways a good idea to visit the free coffee sites. For coffee lovers it is also important to check out their local coffee stores. Many of the stores have promotions, such as an advertisement campaign, where free coffee in connection with other products might be available. Just recently one of the major coffee chains had an ongoing promotion, where coffee lovers bought their friends a coup of coffee and they themselves received their drink of equal or lesser value for free. This might have been a way of the company to lure m ore new customers, but in the end it meant a free coffee for one of the two friends. Sometimes it is a promotion at one of the local festivals, where coupons and vouchers for free coffees are handed out. How about a free coffee with breakfast? Some of the major breakfast places offer a free complimentary coffee, when a breakfast or a breakfast sandwich is bought. For the person that every once in a while or maybe even every morning gets a breakfast sandwich, a bagel or a doughnut at one of the many restaurants this is a good deal. By the way, if coffee is not the desired morning drink, but rather teas, the websites and coffee shops also offer free tea and free tea samples. Even though it is more rare, the pages also offer samples for hot chocolate and new chocolate drink creations that can replace coffee or tea for the ones who rather like it sweet and chocolaty with their breakfast. Whichever one if desired, it is well worth checking out the Internet pages online that offer free samples. Free samples are the way for the customer to try without buying. After all, no one would buy a car before it was not test-driven, so here is the chance to test-drink coffees and more.