If you have a domain, I am sure you are aware of the fact that every domain has at least 2 nameserver entries associated with it. According to Wikipedia, a name server is a computer application/service that maps a domain name to an IP address. DNS (Domain Name System) is the protocol implemented by Internet name servers wherein every domain is required to have a primary nameserver (ex: ns1.example.com) and at least one secondary nameserver (ex: ns2.example.com). If the primary nameserver goes offline, the secondary nameserver would ensure that the domain is still reachable.

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For those wanting to host their own web services such as hosting a web site, FTP service and other similar services from home have many options to accomplish this. One of the very common and popular way of doing this is by using a service to map your dynamic IP address with a domain name. The only problem in this scenario is that your host name/domain-name mapping must be updated with your dynamic IP address as soon as it changes. This way, you may expect minimal disruption of services that you wish to offer from your home based computer.

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For truly mission critical and important sites that demand round the clock availability, fail over hosting is the way to go. But what exactly is failover hosting? – It simply means that your site is available on more than one server and in an event where the site becomes unavailable on the first server, the second server will continue to serve your site. This is failing over from first server to second. Of course, failover architecture can be designed and implemented in several ways but in reality the fail over should actually be transparent to end users who are accessing the website.

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Many hosting companies offer a free domain when you sign-up with them and the domain remains free as long as you are hosted with them. The hosting company will renew the domain on your behalf and continue to do so as long as your hosting account is active with them. While this may sound like a good offer to gladly accept, it mostly depends on which hosting company is offering it and under what conditions. Check for the following points before you sign-up with any hosting provider for an hosting account that offers a free domain:
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A typical domain name looks like www.domainname.com, where the first part (in current example) is WWW (World Wide Web), second part (between the two dots) is the actual name of the domain and the last part (also called Domain Suffix) is to categorize the type of the website. The domain suffix is also known as TLD (Top Level Domain) and there are over 10 TLDs available to choose from. The concept of TLDs came into existence in 1985 with .COM being the first TLD which was then launched. The entire domain name registration process is currently under the supervision of ICANN.

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