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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.
The Convenience of Online Writing Degree Programs (online writing degree programs) Online writing degree programs are not readily available, but they are growing in popularity. There are many traditional and online schools that offer online degree programs to busy writers. The online degree programs offer courses that teach students the basics of writing, including paragraph structure, theme writing, descriptive writing, tech writing, and grammar. Usually in writing degree programs, writers are given many assignments within one week, which range from analyzing the work of others to composing their own short stories and essays. The courses offered in an online writing degree program are much like the ones offered in traditional programs, and students will begin their program by taking beginner’s courses and eventually work their way up to the more advanced. The beginner’s course teaches the basics of writing, but after taking them, students will be able to take more specific courses, such as creative writing and tech writing. The online programs give students more freedom, but the workload is almost the same and students will have more and more writing assignments as they move further into the degree program. The online writing degree programs offer bachelor degrees as well as masters’ and there are many schools that offer these online programs. Chatham College is one school that offers online writing degree programs. Chatham online is the online division of Chatham College, which offers online masters’ degree programs for writers. The writing degree program offered by Chatham online offer 7-week courses and it has no residency requirement. The programs give students the freedom to study anytime or anywhere an Internet connection is available. Chatham online offers many degree options for its students, including the Master of Professional Writing degree, which gives students training to become technical writers, content developers for the web, advertising copywriters, and public relations specialist. It also offers the Graduate Certificate-Non-fiction Writing. This program gives students the opportunity to use their nonfiction writing skills and focus one subject, which include nature, environmental, or landscape writing. Students are given many writing assignments and attend many online writing workshops where their work is presented and critiqued. Once the program is finished writers will have a portfolio of their work that is of publishable quality. Another unique program is the Graduate Certificate-Writing for Children and Adolescents. The Certificate in Writing for Children and Adolescents provides students the chance to write fiction and nonfiction for children and adolescents. There are also many other colleges that offer online writing degree programs including Burlington College. Burlington College offers a Bachelor of Arts in Writing and Literature through an online program. However, this school does require a four-day residency in Burlington, Vermont at the beginning of each semester. Goddard College is also a school that offers a master’s program online. The college offers a Master of Fine Arts in Creative Writing degree through their online program. In this program, students are able to study poetry, fiction writing, creative nonfiction writing, and memoir, play writing, and screen writing. A short residency is also required for the program at Goddard College. The University of Denver is another school that offers online writing degree programs. It offers the Certificate of Advanced Study in Creative Writing. The program includes a range of courses on content and writing processes for fiction, nonfiction, poetry, and other areas of writing. There are many other colleges and universities that offer online writing degree programs including Goucher College, Lesley University, University of Central Florida, and Washington State University. Like all degrees, online writing degrees are not simple to obtain, but they can provide convenience and knowledge, which helps them advance as a writer, or develop writing skills to that will help them in the future. Fair Use Copyright Law Don’t Overstep the Fair Use Copyright Law Many people are interested in the fair use copyright law. The fair use copyright law enables people to use portions of material that is copyrighted for the purposes of criticism or as commentary. The hard part for many people is understanding what is permissible under the fair use copyright law and what is not permissible. Anyone who writes or publishes should brush up on what is allowed and what is not allowed. Using another person’s words to make news reports, to use as a comment or criticism or to use for research, scholarship, or for educational uses that are nonprofit are generally considered fair use. In these instances, the fair use copyright law allows one person or author to make use of another person or author’s work without asking permission to do so. In situations that do not fall within these specifications you are probably violating someone’s copyright if you use their work – especially if you are using another person’s work for economic or commercial gain. When you are trying to see if you can use another’s words, you should keep a few things in mind. The answer to the following questions will help you gage whether you would be violating a copyright. First, are you transforming someone else’s work or are you copying it? Second, are you going to be making any financial gains from your work that would compete with the original copyright holder? Third, do you have the author’s permission to quote their work? Just because you list the author and give credit to him or her does not protect you from infringing upon someone’s copyright. Fourth, how much of the original author’s work are you using? If you are using a substantial amount of another’s work, you are probably in direct violation of their copyright. Many publishing companies have set rules on how much material they will allow to be quoted in other sources. Some of these ranges start at 100 words or less. However, there are truly no standards to go by, so be careful. You can not assume that keeping your copying fewer than 50 words will allow you to pass under the radar – especially if the original piece is hovering around 125 words itself! Lastly, what portion of another’s work are you using? If it is the meat of the book and the most important part of the book, you are probably in direct violation of the owner’s copyright. With a little common sense it is not hard to decide if you are violating someone’s copyright. People who are truly interested in staying within the guidelines of the fair use copyright law usually do a good job of doing so. Many people push the fair use copyright law right up to the line, while others will blatantly cross over it without giving a second thought to the repercussions. When these people are summoned to court to answer for their vagrant disregard for the property and copyright of another they are usually sorry. Sorry they got caught! It is very important that people who take advantage of the fair use copyright law are held accountable for their actions. Without accountability many more people would follow in their footsteps and use another’s works as their own. |