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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.

Web Hosting - Domain Name Changes and How They Affect You New domain names are registered all the time, and ones previously registered expired. Sometimes that's the result of simple neglect. The owner of the name chose not to renew his or her ownership, so the name became available for someone else to use. In rare cases, a highly original mind managed to think of a new one. In the other common scenarios, someone chose to just let it go or sell it. When you choose to change your domain name, there are actually two separate steps involved: releasing the old name, and adopting the new one. But, just as the postal system can have difficulty forwarding your letters when you change your personal name, changing your domain name brings certain difficulties. One of the most prominent is the fact that any name change requires a change to thousands of DNS Servers around the globe. DNS (Domain Name System) is the set of software/hardware components that allows domain names to map to IP addresses. IP addresses are what are actually used 'under the covers' when one computer communicates with another. Note that there isn't always a 1:1 correspondence between a name and an IP address. One IP address can serve multiple domain names and one domain name can have multiple IP addresses. For the sake of simplicity, we'll stick to the common case here. DNS servers around the world maintain internal databases that match the name to an IP address. Not all servers have all pairs of names/addresses. A series of complex routines allows a request to be forwarded when the particular DNS server doesn't have a needed record. When you acquire a domain name that used to be associated with a given IP address, the odds of you acquiring the same IP address are extremely low. In the unlikely case, for example, that you acquired the domain name yahoo.com, you would almost certainly not get the IP address that was matched with it (unless you bought the Yahoo! company). So, as a result of the change, the name/IP address pair is no longer what it was. A similar circumstance exists when you retain your IP address, but want to change the domain name associated with it. In either case, the pairing has changed. The catch is this: when the change takes place, those DNS databases are not all updated instantaneously around the world. Even apart from the limited speed with which computers and networks operate, (and neglecting the human factor if/when the change is made manually to more than one server) the reason is something called caching. In order to communicate efficiently, DNS servers are designed to assume that changes will be relatively rare. Just as with the postal system, you don't move your address or change your name every minute. Since that's true, in general, the name/IP address pair is cached. A cache is a set of stored information that is reused so that fresh information doesn't have to be communicated with every request for a web page or data. A chain of DNS servers pass requests to the last known address. There is usually more than one system between your computer and the server you want to communicate with. Most of the time, that's your current name/address. When you change the name, that pair is no longer valid. In order to propagate the new name/address pair (so the terminology goes), that cache has to be refreshed. Something similar happens when you establish an entirely new name. That name is first associated with an IP address and that pair has to be communicated to DNS servers around the world in order for you to be able to reach any one of them at random. But DNS servers don't do that until they are requested to do so by your action of asking for information from a remote server. Because of that, but chiefly because of caching, it can take quite a while for the new pair to become known around the Internet. Caches can expire and get refreshed in a few minutes or a few hours. It varies. That time can be as short as an hour or less, if the path between your computer and the web server is very simple and only one DNS server needs to be updated. Or, it can take up to 48 hours or more. Though the 'official' range is often given by registrars as 24-48 hours, the average is closer to about six hours. But that's an average. The actual time in any given case can (and does) vary widely. In the meantime, a number of effects can occur. The most obvious is that, since the name/IP address pair can't be resolved properly, you don't reach the server you want. Your browser points to the old one (in the rare case it's still accessible by that name and address), or it simply reports there's no such name at that address. So, when registering a new name or buying an old one, you should establish the site, but not advertise it for at least a couple of days. Better to wait to get visitors than to turn them off by being 'not at home' when they call.

Reduce Employee Turnover and Produce a Great Employee For so many businesses in the United States it is the same picture they see year in and year out. Employees come, get trained, start to be efficient at work and then they leave. The company needs to train somebody new. To reduce employee turnover and produce a great employee, many things need to be established within a company as a support structure. Many companies so often neglect to ask and wonder what their employees might like or think would be helpful to make their work environment and conditions positive ones. Whether owning a small or a large company, your immediate concerns probably lie within making profits to be able to keep the company running and to be able to pay your employees. Of course, running a company takes a lot of effort and work hours spent solely on that. But every time one of your employees leaves, you loose capital--capital you have invested in his or her training and knowledge. The knowledge capital you loose is all the information that the employee has absorbed during his or her employment at your company and all the new skills he or she might have added during the course of his employment. So how can you make your company and working for your company more attractive and also produce great employees? There are many ways that this can be accomplished, most of them are rewards to the employee, but others that are just as important include the atmosphere and conditions at the workplace. This article will discuss just a few of the many possibilities you as an employer have to keep employee turnover low. For most employees, considering that they have an expectation towards the standard of living they have, a competitive salary is an important point. If you only pay minimum wages or never give raises and rewards, it is very unlikely to hold good employees that can make a lot more money somewhere else. To make their time worthwhile after hiring, you need to know what a competitive pay is and pay them either the average pay or slightly more. As for raises, raises together with evaluations will tell the employee that his or her effort and all the hard work he or she put into your company is appreciated. It also tells the employee how good his work is and what you will expect from him in the years to come. To produce a good employee, it is important to give the employee feedback on his work. Some companies reward their employees with bonuses for accomplished tasks or finished projects. Other companies will give their employees an award at the end of the month or year and generally attach a small bonus to that. Also consider a good benefit package. Many employees look for the benefits that companies offer to them and their family to make a decision whether they should work for this company or choose a different one. Often times, vacation is very important to employees. To be a motivated and good worker, employees need to spend time with their families or the things they love, like hobbies or sports. Yes, of course you would like them to work 60 hours for the 40 you pay, but consider this: an overworked overtired employee is most likely not able to work fast and efficient. That person also tends to be more error prone and unmotivated. Time off work to relax or regenerate is very important. Companies that offer ten days are often at the top of the list for employee turnover. Some companies offer flexible work times to accommodate for many different characters and situations at home. The employee that likes to come early and leave early versus the employee that likes to sleep long and then leave somewhat later feels just as welcome in this company or setting. Besides all these added factors, the work environment also plays a great role in producing great employees and reducing turnover. A respectful and good working environment is very important to keep employees happy and motivated. You know that a happy, motivated employee works better, faster and makes fewer mistakes.