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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.
Clean Up your Digital Profile and Land that Job Whether you are looking for a job after getting fired or you are looking for a job other than the one you are working at currently, many steps in that process are the same. You need to get your résumé up to date and conform to newest standards, you need to get your wardrobe together and most of all you need to be prepared to go for the interview. But did you know that in a fast paced society with all the high technology gadgets, employers and companies appreciate a good digital profile? When it is time to land a new job it is time for you to clean up your digital profile. For those of you who might not know what a digital profile is, let?s reminisce about digital profiles for just a second here. A digital profile is any and all information about you that can be found online. It can be anything from your own homepage, over articles and answers that you have posted on the Internet to videos and pictures of you. Anything that is somehow connected to you and your name and can be found through Internet search engines such as Google, Yahoo and other crawlers belongs to your digital profile or e-portfolio. Believe it or not, many employers have started to check out your digital profile online by doing a little research on the Internet and finding any information about you. If it is on the Internet it is public information and therefore not illegal. Information on the Internet does not necessarily have to be positive. What if one of your friends posted some stories or pictures/movies about you on the Internet? Employers might see that and think that you are not fir for the tasks that are asked form you by the new job and might just plain throw your nice résumé into the trash before they ever have a chance to meet you in person. Therefore before going onto your next job-hunt, clean up your digital profile. Steps you can take to clean up your e-profile are many and one of the easiest ones is a regular search with different Internet search engines about things that are related to your name. See what comes up and try to clean it up. If there are pictures or movies posted on such pages as u-tube about you, try to get friends or the owners of the page to take them down or at least take your name of the page in such a way that a search engine cannot find this information when somebody is searching for your name. A very important positive step in cleaning up your digital profile is to create your own positive statements and information on the Internet, such as online résumé, Personal web pages or a personal development plan (PDP). If the amount of positive information, academic achievements, and plans for the future are greater than any negative amount of information they can find, the light shed on you is of good nature and your chances are greater to land that job than when they only find negative information for the reasons that you never knew about a digital profile. Should you still be new to all of this and you are not quite as well versed on the Internet, there are places that can help you. Many Universities and development centers offer help and tools just for this kind of situation. Public libraries also offer you free time on the Internet as well as other resources in connection with the job-hunt and digital profiles. So before you actually send out your résumé, make sure that you checked online for any information that might harm you.
Freebie Etiquette (Yes, There is Such a Thing!) When you are on the hunt for free stuff, it can be easy to be so blinded by the offers that your manners go flying out the window completely. You may also just not realize that when it comes to taking advantage of freebies there is a general code of conduct that it pays to follow. While you are racking up the free stuff, keep these common courtesy rules in mind so that you are doing your part to keep the hunt for freebies fun and enjoyable. Freebie etiquette rule number one is to remember that there is a face behind every freebie, no matter how distant it may seem. Since so many freebies come from websites and you don?t actually have interaction with a human being while you are getting them, it can be very easy to forget that someone (or very likely, a lot of someones) worked hard to bring you that website and that free deal. If you have a problem with a website or a form while trying to get some free stuff, deal with it as respectfully as you would if you had to approach a customer service rep in person. Leaving foul-mouthed posts on a message board or unloading a barrage of outrage on a customer reply form isn?t the way forward. Someone ? a real person ? will have to help you, and you?ll get a lot further by treating them with respect. Respect is also the name of the game when it comes to rules attached for freebie offers. There are often restrictions in place for taking advantage of free offers, such as the age you have to be to cash in on the offer or how many offers per household can be taken. Sure, there are plenty of ways to get around these rules and ?trick? a company into giving you an offer for which you are not really eligible. However, when you try to simply bleed out as many free offers as you can, you?re only making it hard on companies to be able to keep bringing these offers to you. If this freebie isn?t for you, take a back seat and make room for the folks who can take advantage of it. Your time will come. Related to this last rule is the idea of not being too greedy when gobbling up the free stuff. Just because something is free doesn?t mean you should use a ?smash and grab? approach and go for as much as you can get of anything you can get. Remember that there are a lot of other people out there who like to get in on the freebies, too, and think about how you would feel if you lost out on something you really wanted because someone came along and took them all. Don?t take more than your share of any free offer, and don?t take things you don?t want or need just because they?re free. Everyone loses when you do that. Last but not least, if you have an opportunity to say thanks for a freebie, grab it. Of course, this can be hard to do when the free offers you are taking advantage of are found on the Internet, but there are still ways. Look for the customer comment field in the request forms you fill out to get your free stuff and leave a quick thank you there. You can also write a thank you on message boards and chat rooms that are associated with the freebie websites. The good will generated by your gratitude will only help convince companies that freebie offers are useful tools for reeling in the customers.