An administrator needs to secure a wireless network and restrict access based on the hardware address
of the device. Which of the following solutions should be implemented?

A.
Use a stateful firewall

B.
Enable MAC filtering

C.
Upgrade to WPA2 encryption

D.
Force the WAP to use channel 1

Explanation:
MAC addresses are also known as an Ethernet hardware address (EHA), hardware address or physical
address. Enabling MAC filtering would allow for a WAP to restrict or allow access based on the hardware
address of the device.
Incorrect Answers:
A: A stateful inspection firewall is aware that any valid outbound communication will trigger a
corresponding response or reply from the external entity. It will not, however, restrict access based on
the hardware address of the device.
C: WPA2 encryption would prevent access if the correct password or passphrase is not entered. It will
not, however, restrict access based on the hardware address of the device.
D: Forcing the WAP to use channel 1 will help if there are multiple WAPs using the same channel. It will
not, however, restrict access based on the hardware address of the device.

https://en.wikipedia.org/wiki/MAC_address
Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp. 6, 61
https://en.wikipedia.org/wiki/Wi-Fi_Protected_Accesshttps://en.wikipedia.org/wiki/List_of_WLAN_channels