Which of the following is a widely used Data Link Layer protocol, often used to access the Internet, supports link error detection and multiple protocols?

For decades, the economies of China, the former Soviet Union, and India functioned according to the tenets of:

A) market capitalism. B) market socialism. C) centrally planned socialism. D) centrally planned capitalism. E) market capitalism and socialistic capitalism.

Which one of the following is the biggest disadvantage of mail surveys?

A. Increasing postage costs D. Time delays in returning surveys B. Interviewer bias E. Lack of anonymity C. Lack of control over who responds