A security engineer discovers that during certain times of day, the corporate wireless network is dropping
enough packets to significantly degrade service. Which of the following should be the engineer’s FIRST
step in troubleshooting the issues?
A.
Configure stronger encryption
B.
Increase the power level
C.
Change to a higher gain antenna
D.
Perform a site survey
I think that is D, site survey first step to see what is going on.
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Site surveys can be expensive and time consuming. Increasing the power is a quick way to tell if the wireless system can handle more requests. B is the answer.
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I think it is D
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A wireless site survey, sometimes called an RF site survey or wireless survey, is the process of planning and designing a wireless network, to provide a wireless solution that will deliver the required wireless coverage, data rates, network capacity, roaming capability and Quality of Service (QoS).The survey usually involves a site visit to test for RF INTERFERENCE, and to identify optimum installation locations for access points. This requires analysis of building floor plans, inspection of the facility, and use of site survey tools. Interviews with IT management and the end users of the wireless network are also important to determine the design parameters for the wireless network.
Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction
So the best thing to do is to INVESTIGATE what is causing the degradation of the Wi-fi during certain times of the day. This can only be done via a SURVEY.
This does not have to be an expensive exercise at all, and can be achieved by taking a cursory glance and talking to key people.
The above could be caused by simple environmental fact, such as an air-conditioner kicking or the excessive use of a Microwave during lunch hours. Both of these can cause an RF INTERFERENCE if they are close enough to a wi-fi modem.
Also, I can increase the power of the antenna all I want, but this will not:
a) Determine the root cause
b) Stop the RF INTERFERENCE or be impervious to it
So I think that D is indeed the best answer
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