If DNS server is unable to resolve query, it in turns queries other DNS servers, using a process known as recursion. DNS servers make use of root hints to assist in locating DNS servers, which are able to provide required result. In this way, DNS queries are minimised and Internet is able to operate quickly and effectively.

A typical query may run as follows:

Client contacts Nameserver A looking for www.discountdomainsuk.com.

Nameserver A checks its cache, but can’t answer, so it queries a server authoritive for Internet root.

The root server responds with a referral to a server authoritive for .com domains. NameserverA queries the .com server and gets referred to server authoritive for www.discountdomainsuk.com.

Nameserver A queries this server and gets IP address for www.discountdomainsuk.com.

Nameserver A replies to client with IP address.

Queries can return answers that are authoritive, positive, negative or referral in nature. In event of a negative answer, another DNS server is queried.

www.htmlhelp.com/tools/validator

Keyword density

Writing keyword rich copy isn’t easiest task in world, but to get a good ranking, your keyword density has to be right, not too low, not too high ( between 3% and 7%). The following is a good article on subject and contains a link to a good density tool.

The article http://www.in-vancouver.com/members/news_item.php?record_num=48

The tool: www.keyworddensity.com

Selecting keywords

Not sure which keywords will bring what traffic?

Wordtracker has a great site – try their free report first, if it works for you, sell a days usage from £4.00 ($6.00).

www.wordtracker.com

I hope you find these tools helpful, I use them on a daily basis and find them very helpful.

Every thought of a question you wanted to ask Google?

Google answers works by you posting a price for each question - higher price more likely it will be answered. Higher bids also get more thorough explanations. Payment is by credit card and prices start from $2.00

This is a good place to get started with web site optimisation. Typically an experienced researcher will spend an hour or so looking at your site for £40-50. This compares very favourable to £100's you can pay elsewhere.

A good tip is to read last few weeks of questions - most likely there will be questions very similar to yours.

The answers given often are full of links to sites which are both reputable and amongst leaders in their field.

The site is also full of helpful questions and answers on domain names and web tools

I hope you found this article helpful, my site now has a glossary full of similar ones.