You are starting a company on a tight budget. You can get DSL line to your office with a static IP address, but ISP does not offer any DNS services.
At this point you do not want to set up your own DNS, so you want to find out if any companies offer such a services. Somebody told you about UltraDNS.
What exactly does this firm offer? Find at least two other companies that will provide DNS servers for you. Write one to two pages.