A(n) ________ is a heavily secured server located between a company's secure internal network and its firewall.

A(n) ___________________ holds a group of items and can be added to while the world is running.

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

Businesses should follow best practices when using social media which include all of the following except _______ .

A. secretly collecting user information for advertising purposes B. fostering relationships with customers C. sharing product information D. getting customer reaction in real time