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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: 22.214.171.124
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 - Is a Dedicated Server Worth What You Pay? In reviewing web hosting plans, many web site owners are faced at some point with the decision of whether or not to pay for a dedicated server. A dedicated server is one which holds your site(s) exclusively. It's not shared with other sites. You then have the option to put one site or many on that piece of hardware. But the decision is never easy. There are multiple considerations to take into account, far beyond just the higher dollar outlay that inevitably accompanies a dedicated server option. Performance is (or should be) a prime consideration for the majority of site owners. Studies show that when a page doesn't load within about 10 seconds or less, almost everyone will give up and go elsewhere. The delay may be caused at any of a hundred different points in the chain between the server and the user. But often, it's the server itself. In any case, it's important to eliminate the server as a possible bottleneck, since it's one of the few points over which the site owner can exercise some control. That need for control extends further than just performance, however. Other aspects of the user experience can benefit or suffer from server behavior. Security is a prime example. With the continuing prevalence of spam and viruses, a server can easily get infected. Having only your site(s) on a single server makes that issue much easier to deal with. With fewer sites on a server, there is less likelihood of getting infected in the first place. Also, since you will place a higher value on security than many others, it's easier to keep a dedicated server clean and your site well protected. You can use best practices in security to fortify your site. Having other sites on the server that you don't control raises the odds that your efforts are for nothing. One way your efforts can get watered down is through IP address sharing. Less sophisticated hosting services will often assign a single IP address to a single server and multipe sites. That means your site is sharing the same IP address with other domains. That leaves you vulnerable in several ways. Virus or spam attacks may target a particular IP address. If you have the same one as another site, one that is more likely to attract hostile intentions, you suffer for and with someone else. In other cases an IP address range is assigned to the server, with each site receiving its own address from within that range. Though better than the one IP:server scenario, this still presents a vulnerability. Many attacks try a range of IP addresses, not just a single one. But even legitimate sources can give you trouble when you share an IP address or a range. If another site engages in behavior that gets it banned, you can suffer the same fate if they ban the address or range. If the miscreant that shares your server/IP address or range is himself a spammer for example, and gets blacklisted, you can inadvertently be banned along with him. Using a dedicated server can overcome that problem. There's a certain comfort level in knowing what is installed on the server you use, and knowing that you alone put it there. But a dedicated server option may require increased administration on your part. If you're not prepared to deal with that, you may have to pay still more to have your dedicated server managed by someone else. All these factors have to be weighed carefully when considering a dedicated server plan.
Judging by Appearance ? It Happens in the Workplace This is one of the old sayings that really does come true, the clothes do make a person. What does it mean? For many people, it means that people judge by the clothes you wear. This is especially true in the workplace, but also for everyday life. Many companies nowadays have a dress policy in place to keep the appearances at work up. Reasons why companies have dress policies are of a great variety. Here is a review. One of the biggest reasons for companies to require nice appropriate clothing at least in their office area is visiting customers. If your employees need to be in contact with customers on daily or weekly bases or if customers do visit your offices in general, it is important that your employees make a good first impression. First impressions are very much guided by what you are wearing, your facial impressions and body posture. Therefore, if your customer see your employees working on their desks, it is important that the employees are dressed appropriately. For most workplaces this means a button down or polo shirt, dress pants or casual dress pants. In some instances, it is important for the employees to wear a tie and suit. For women, the codes are equivalent what the style of the clothing is referring to. Imagine what would happen if a customer comes into a company and the employee receiving the customer wears dirty, spotty, old and ripped clothes. In society that does not make a good impression, then the customer will most likely not want to do business with you. Another reason of why companies and employers would judge by your appearance is called professionalism. In the picture of professionalism at the workplace includes good appropriate clothing. It belongs to being a good employee as much as doing your job right and being polite and respectful to your boss and colleagues at your workplace. In society much is judged by the way you dress. If you have ever walked into one of the better department stores with a set of old, worn clothes, what kind of response do you get from the sales person? Often times they think you do not have enough money to buy here anyways and that is the way they treat you. They may not even give you the time of day, even if you have a lot of money. They judge you by what you have on and this is certainly the case in the workplace as well. If you want to project a good image, then take a good look at what you wear before you step out of your door in the morning. There are many places where a dress code is required or expected, such as the church, the opera, the theater, better restaurants and many other places. The workplace is just one of many and whether you like it or not, appropriate clothing is what can make or keep you get the job. Many Internet sites, books and people that offer advice on interviews and getting that job, will emphasize the importance of nice appropriate clothing and the impact it can have when you wear something that stands out from the crowd. Most people have been raised to think that proper dress attire is what you should wear at work, but for some it still is more a mystery to them than anything else.