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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.

Craigslist a Great Place to Find Free Stuff – While Exercising Caution of Course Craig Newmark of San Francisco founded Craigslist in 1999. Craigslist is a web page that offers anybody to sell or by articles virtually free of charge. Some of the categories such as job ads in some of the major cities have a charge, which is the funding for all the other private, free ads on Craigslist. Currently the web page is available in approximately 450 cities all over the world. IT serves more than nine billion viewers per months and therefore gives the web page a ninth place in the rankings for most frequently used web sites in the United States. The web sites offer over thirty million new postings and classifieds each month. Categories for classifieds and advertisement range from job and housing postings over traditional buy and sell classifieds all the way to community events and personal ads. Since Craigslist offers so many different ads and classifieds each month, it is also a great place to find free stuff. Many people that are about to move or have top give up a hobby due to whatever reason often times offer things for free on this web page. Generally ads and classifieds are divided by categories and then listed on the pages depending on the proximity to a major city. Many major cities in the United States have their own Craigslist. Classifieds that are posted on a city site generally are from somewhere in the proximity of the city. Often time’s sellers expect the buyer to pick up the merchandise. Therefore, it is not unusual to find car ads, fitness equipment, baby clothing and items, furniture and more on the web site. Posting is for most classifieds free and there are also no fees for anything else. In contrast to some other pages, posting a used children’s toy, a piece of furniture or similar as well as anything else is completely free. The seller has the possibility to stay anonymous till shortly before the sale, when the seller decides to hand out his or her telephone number or address for sale purposes only. Of course such classifieds and advertisements can also be cons and need to always be handled carefully. Generally a good judgment of the price and offer helps to prevent from falling for fraudulent classifieds. Even though there are measures from the creators of the website to prevent fraud such as official statements and more, there is no guaranty that a fraudulent add will be taken off in time to prevent any trouble. So whenever buying or selling on Craigslist do it with caution. Craigslist offers classifieds for anything. Community, housing, personals, jobs, for sale, services, gigs and even discussion forums are all part of the web site. On this website anybody can post anything. Therefore it might take some time to find the right ad. It might even be possible that the chosen product cannot be found. Craigslist works like an online yard sale or a flea market. Therefore finding the exact product may be hard. But sometimes getting lucky is all that it takes and then the seeker is united with the product of desire. This web page should be used and supported by anybody and everybody. Whatever there is for sale, it should be put up on Craigslist, so that other people can male good use of a product that might be a good product for someone else for a few more years. Even jobs can be found on Craigslist. In cities such as New York, this web page’s jobs are one of the most important sources for job hunters and therefore are not free of charge for the employers that are posting in some of the bigger cities.

Staying Computer Safe while Searching for Freebies on the Net Who doesn’t love the idea of getting something for nothing? Free stuff can bring a smile to anyone’s face, and the Internet is destination number one when you are looking for cash in on a few freebies. The downside of free stuff online is that if you aren’t careful, the free item could end up causing plenty of headaches and heartaches, not to mention a lot of cold, hard cash. If you want to score with free stuff online, make safety your number one priority by following these tips. First and foremost, treat your personal information like its cash. That might sound a little dramatic, but anyone who manages to steal your identity online is after one thing, and one thing only, your money and any addition money they can grab by cashing in on your credit. Protecting your name, address, credit card number, bank account number, phone number, social security number, and so on and so forth when you are registering for free offers is the first step to making sure you don’t get hustled when you’re just trying to enjoy a good freebie. That means that if you are asked for some personal information that you don’t feel comfortable handing out, let the freebie go. Likewise, make sure the site from which you are getting your free stuff has a privacy policy and that you know it, understand it, and can live with it. Speaking of that site that is handing out the free goods: just who are these people? If you were walking down the street and a shady looking person said they would give you a free DVD player if you followed them, chances are you would run the other way. Online, it is hard to tell the legitimate people from the people looking at you like a free lunch, but there are a few red flags you can look out for. Does the website look like it was thrown up in about 5 minutes, full of clip art and bad spelling? Is it hard to find information about where the website is registered, or where the business the website is supposedly promoting is registered? If the website purports to be affiliated with a certain brand you know, does it really look like it is, or does the logo look different/colors look off? If you can’t get a reasonable feel for who are dealing with online, don’t deal with them. Red flag number one? Asking for too much personal info should send you running. Another way to protect yourself is to build a virtual fortress around your computer. The net is filled with people who know how to walk right into your virtual home – your computer – and flip through everything you have on there, taking whatever they want. Many of these kinds of hackers draw you in by creating phony freebie websites. The way to keep them out is to keep your computer on lockdown. Make sure your firewall is stronger than you think it needs to be, and make sure it is always updated. Also, make sure you have antivirus software on the patrol for you and that you keep this software updated as well. Last but not least, keep those passwords in the vault, and make sure they are extra strong. No freebie website has any reason to ask you about the passwords for your accounts so don’t give them away – and don’t give them to anyone else online for that matter. Also, if you’re using your birthday or child’s name as password, don’t. Sure, it isn’t as easy to remember, but your password should be a random word and contain a collection of numbers and symbols as well. This will give you the extra layer of protection to make sure your online house is in order when you cash in on the freebies.