In the early 1980s, TCP/IP was used only in the United States.

The _____ is encoded using only the previous I- or P-frame as the reference frame.

A. B-frame B. I-frame C. P-frame

To determine the difference between two Instants, use class Duration’s static method ________, which returns a Duration object containing the time difference.

a. difference b. interval c. between d. span