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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: 126.96.36.199
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 Top Virtually Bug-free Free Email Services on the Net Virtually bug-free e-mail services are available actually from several places. Many of these service providers are big names, known by many, especially Internet users. The difference between the different e-mail providers lies in several things. These differences include but are not limited to plenty storage space, effective spam filtering, a fast user-friendly interface, desktop e-mail program access and much more. Currently in the United States and the rest of the world, the best offer for free e-mail comes from Gmail. Gmail is part of the Google business enterprise (the search engine most of us know) and offers the most features and storage space for their users for free. With virtually unlimited storage capacity for e-mails, a user never has to delete any e-mails of the server and can collect all the messages. Gmail offers a simple user-friendly interface, which also includes an excellent search function that lets a user find messages instantly and precisely. Another great feature of gmail is the POP and IMAP access features. This gives the user the possibility to download the e-mail from the server with any e-mail program that the user generally would use. The program can then also automatically download the e-mails into the program ready for the user to read. Gmail is funded by displaying advertising next to the e-mails read. Next on the worldwide list would be GMX, a German provider that offers many of the features gmail offers, but with limited storage space. This program also has the POP feature and can therefore be used in conjunction with any of the common available PC e-mail programs. Right after gmail it is one of the most reliable e-mail services, but unfortunately they discontinued the English user face and only offer a German version now. Thereafter on the top free e-mail services providers is AIM Mail. It is the free web-based service from AOL. Like gmail it offers virtually unlimited online storage, excellent spam protection and a simple, easy to use interface. Unfortunately, AIM Mail lacks proper productivity, such things as labels, smart folders and message threading is not available. AIM Mail also offers a very functional POP and IMAP access. Yahoo! Mail would be the next e-mail service that should be mentioned on the list of the top virtually bug-free services on the Internet. Yahoo also offers virtually unlimited storage space for e-mails and a few other nice features, such as Short message services for texting to friends and family, instant-messaging features for the internet and up to date news feeds. What Yahoo! mail lacks is a really good spam filter. It offers a spam filter, but it is not effective enough. Also nice to have would be labeling options as well as smart folders. The Yahoo! Interface is just as easy and user-friendly as the other providers and fairly reliable. To complete the list we need to mention the following three services, Inbox.com, FastMail and Hotmail. Inbox.com offers e-mail users 5 GB of free space to store e-mail online. Despite the limited space, this service is outstanding due to its high-speed accessibility. Web access and POP access are very fast and even the search functions are faster than with most other services on the market. The drawbacks of Inbox.com are the missing IMAP access, only POP is provided and the organizing of mail is slightly unorganized due to missing smartfolder technology. FastMail on the other hand offers users only IMAP. It has many useful features and has one of the best web-based e-mail interfaces. It also generally displays fewer ads then the other services do. And lastly, Live Hotmail should be mentioned here, since most PC users that have a Windows based operating system will have heard of hotmail. This program offers 5 GB of storage for e-mails online. It has a fast search option, a solid security feature and the interface is as easy as the ones users are used to on their desktop. Even though security is great, the spam filter is not quite as effective as some of the other e-mail providers. Also missing with this provider is the POP and IMAP access as well as smartfolders and other great e-mail organizing features.
Five Flex Time Options that Can Propel your Employee Productivity Flex time is something that is still very rarely used in the United States, but has many followers in other countries, especially European countries. Flex time in general means flexible working hours for employees of a company. They way the flexible working hours are implemented can differ greatly. But one thing is for sure, flexible working hours can greatly propel the employee productivity in your company. Take a look at five different ways to implement flex time in your company. The first and probably easiest way is to give your employees the option to come in to work and leave work within a certain time range. For example, so far your employees worked from 8am to 5pm, now you might give them the opportunity to come in to work anywhere from 7am to 9am, and of course, leave somewhere between 4pm and 6pm. This first model would give your employees an opportunity to be on time as long as they are within that range and their individual habits are considered in regards to being an early riser or a late sleeper. This first model would set the rule that there are 8 work hours plus a one hour lunch in a work day and these are not variables. Therefore, you only have to check their arrival and leaving times in one way or another. A second option is very similar to this, but you can expand the hours worked to a weekly or monthly check, where the employee is responsible to work 40 hours a week with one hour lunch everyday. Then he or she can come and leave in the morning and afternoon in the specified time ranges. For the employee, this means maybe on days that he or she is more energetic, they can spent more hours at work to get their work done and on days they do not feel so energetic or so good or they have family things going, on they can come in the minimum hours established from 9am to 4pm. This version of flextime is a much appreciated model by many employees, but for the employer, it means more work in tracking hours worked and arrival times, to make sure the required hours per week or months are worked. An even more advanced version of the first two flex time themes is a theme where the worker can accumulate time to take off at some point in the future. How specifically you are going to use this version is up to you. You basically are making sure that your employees are not working more than the required amount of hours. Why would you profit from this? Less time spent at the work place makes for more time to relax and regenerate and your employees will be more efficient and motivated throughout your work week. In some companies this flex time method allows the employee to accumulate hours up to a certain amount and then for example, they are allowed to leave after six hours for several days to be home for activities with their family. In an even more expanded version, a fourth version of flex time options, the employee can actually take full days off after having accumulated hours. These days are in general additional to vacation and holidays and can be taken in agreement with their supervisor. The fifth option that has been adopted by some companies actually gives the employees the chance to go into negative hours on their time account. This means if you do not have the required hours, you can still take a flex day off, but have to make sure that after a period of time, that the employer sets in the contract your account goes back to zero or higher. If the employer is a really generous person, he might allow you to completely choose the hours you want to work. You might be able to take work home or work from 10pm to 3am if you desire, as long as you have your assignments done on time and your hours are fulfilled.