All of the following are recommended to secure a wireless network except:
a. changing the default password on your router.
b. turning on security protocols.
c. using static ip addressing.
d. restricting access to the network to certain mac addresses.

D. restricting access to the network to certain MAC addresses.

Explanation:

This kind of protection is less effective and of course not recommended because the MAC address could be impersonated/simulated by several programs in the market. So for example you could sniff a network to see the packets going around and observe the different MAC addresses and just replace yours (MAC address Spoofing)

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