Microblogging, which resembles a combination of blogging and trolling, involves broadcasting brief (typically 140 characters or less) messages to a public website, or sending email or text messages, to subscribers.

A(n) _____ is used to test wall outlet connections

Fill in the blank(s) with correct word

_________ refers to the use of multiple, overlapping protection approaches addressing the people, technology, and operational aspects of information systems.

A) Layering B) Modularity C) Encapsulation D) Open design