The __________ certification program has added a number of concentrations that can demonstrate advanced knowledge beyond the basic certification's CBK.

The decimal number 15 is represented in hexadecimal as ________

A) A B) B C) F D) D

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