The most common type of Internet search is the ____.

What is NOT one of the vital services provided by secondary DNS servers?

A. Secondary DNS servers ensure a copy of the primary server's data exists. B. Secondary servers enable load balancing among primary DNS server and its secondaries. C. Security is improved by preventing access to primary DNS servers. D. Congestion is reduced by secondary servers that are strategically placed to reduce load.

If you open a file and make changes to it and then save the changes, that file has been ____.

A. edited B. duplicated C. formatted D. saved as another file