Comptia Security Plus Mock Test Q79

Which of the following should be performed to increase the availability of IP telephony by prioritizing traffic?

A. Subnetting
B. NAT
C. Quality of service
D. NAC

Correct Answer: C
Section: Network Security

Explanation:
Quality of Service (QoS) facilitates the deployment of media-rich applications, such as video conferencing and Internet Protocol (IP) telephony, without adversely affecting network throughput.

Incorrect Answers:
A: Subnetting is a dividing process used on networks to divide larger groups of hosts into smaller collections.

B: NAT converts the IP addresses of internal systems found in the header of network packets into public IP addresses.

D: The goals of NAC are to prevent/reduce zero-day attacks, enforce security policy throughout the network, and use identities to perform access control.

References:
https://technet.microsoft.com/en-us/library/cc959594.aspx
Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp. 39, 40