CompTIA
220-802 · Question #548
220-802 Question #548: Real Exam Question with Answer & Explanation
The correct answer is B: Change the default username and password. Changing the default username and password on a remotely managed wireless device is the most critical step to prevent unauthorized access, since default credentials are publicly documented and trivially exploited.
Question
An administrator sets up a wireless device that they will need to manage across the Internet. Which of the following security measures would BEST prevent unauthorized access to the device from the Internet?
Options
- ASet the channels to wireless 802.11n only
- BChange the default username and password
- CEnable the wireless AP's MAC filtering
- DEnable the wireless AP's WPA2 security
Explanation
Changing the default username and password on a remotely managed wireless device is the most critical step to prevent unauthorized access, since default credentials are publicly documented and trivially exploited.
Common mistakes.
- A. Setting the wireless channel to 802.11n only affects the radio protocol used by wireless clients and has no effect on Internet-facing management access security.
- C. MAC filtering applies only to wireless client associations on the local network and does not protect the device's management interface when accessed over the Internet.
- D. WPA2 secures the over-the-air wireless connection between clients and the AP, but it does not protect the device's web-based management interface from Internet-based attacks.
Concept tested. Changing default credentials on network devices
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