The ______ effect can create a feeling of being in a big auditorium.

______________________________ is based on the principle that distance can be measured by computing the time required for reflected energy to be measured at the source.?

Fill in the blank(s) with the appropriate word(s).

In 2007 the average time between bringing an unsecured server (or client) onto the Internet, and its being infected by one of the thousands of circulating Internet worms, is less than 2 minutes.

Answer the following statement true (T) or false (F)