Which of the following defines how a network uses close-range radio signals to communicate between two devices or objects equipped with this technology?

In regard to SkyDrive security levels, a setting of ________ means that your friends on Windows Live, except for those for whom you have restricted access, can either view or modify it depending on the option you choose

A) me B) friends C) my friends and their friends D) some friends

?The Network Time Protocol service uses what port number?

A. ?TCP 123 B. ?TCP 89 C. ?UDP 123 D. ?UDP 90