HTG (how to geek), is possibly the top site for technical related questions and how-to guides. Regarding this question specifically, they have a fairly in-depth article explaining what exactly DNS is.
Check on the discussions I posted a link to an article that details how to change the DNS in XP, vista and 7
You can purchase a DNS if the person who is currently holding it is will to sell it to you. The best place to find DNS's for sale is on the internet. There are a number of sites that act as DNS clearing houses. Domaintools is one such site.
DNS load balancing is defined to be spreading the load of people on a certain website accross multiple survers if one does not suffice. One can find more information about DNS load balancing on sites like Zytrax and Splux.
Reverse DNS lookup means one is trying to find the domain name associated with a particular IP address. Forward DNS lookup means one is trying to find the IP address associated with a domain name.
It means, you do not have secondary DNS server.
DNS Made Easy is a solution for business to setup a DNS and own multiple domains. DNS Made Easy information is best obtained through their website that has plan information.
DNS is a Domain Name Server, used to create unique entries in an Active Directory. The brand Neustar seems to be associated with Ultra DNS. Ultra DNS is the name for one of the top DNS providers and services many Top Level Domains and Second Level Domains.
There are a few places that these reports can be obtained. The easiest way and probably the most reliable would be to go to the DNS website and get one there.
DNS commands, or Domain Name System commands, can be confusing. However, the website 'alliedtelesis' provides a list of DNS commands that are easy to download in a handy PDF format.
There are many places where one would be able to find details on creating an email using HTML. One would be able to find this information on sites such as "Benchmark email".
It is useful only in small environments. When you have only one DNS in organization and users mainly use internet (external DNS names) then you can configure in DHCP that users will obtain also external DNS server address as secon one. It will be used only when first DNS service won't be accessible. P.S.
You can find out this information easily at sites which offer this service by looking up the DNS records of a domain name. You can also find this service on the official home of domain names, Nominet.