In the accompanying figure, Item 2 points to the ____.

A network administrator decides to secure their small network by allowing only specific MAC addresses to gain access to the network from specific switches. Which of the following is described by this example?

A. Packet filtering B. Hardware firewalls C. Port security D. Stateful inspection

A data structure with optional elements contained in parentheses or either/or elements contained in brackets will have a corresponding ________ statement in the process specification.

A) DO ... WHILE B) PERFORM C) DO ... UNTIL D) IF ...THEN ...ELSE