Exam 200-355 topic 1 question 220 discussion

Actual exam question from Cisco's 200-355

Question #: 220
Topic #: 1

[All 200-355 Questions]

Which two actions are best for deploying VoWLAN on a wireless network? (Choose two.)

A. Minimize the use of Class 3 Bluetooth devices.
B. Minimize the use of analog cameras.
C. Minimize the use of IP cameras.
D. Maximize client access by enabling all data rates used by clients.
E. Maximize client access by enabling only a few high data rates used by clients.

Show Suggested Answer

Suggested Answer: BE 🗳️
Analog cameras can operate in the same frequency of the wireless network, causing interference. The goal in setting the data rates for the VoWLAN network is to match the data rates of VoWLAN handsets as closely as possible, enabling a few high data rates used by the clients. http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Mobility/emob41dg/emob41dg-wrapper/ch9_Voic.html

by xtrattitude4u at Aug. 2, 2019, 11:44 p.m.

Comments

Submit Cancel

JEVC

5 years, 5 months ago

From Official Cert Guide: Bluetooth devices are grouped into three classes according to their radiated power. Because Bluetooth operates as a PAN, its signals have a relatively short range. Class 1 “industrial” devices use a maximum transmit power level of 100 mW and have a typical range of 100 meters. Classes 2 and 3 are usually mobile devices which use a maximum transmit power of 2.5 mW and 1 mW, for a useful range of 10 and 1 meters, respectively.

upvoted 2 times

...

xtrattitude4u

5 years, 11 months ago

I think A is also correct. Bluetooth uses 2.4Ghz but normally does not affect WLAN networks becuase the transmit power with class 1 and 2 blutooth devices is very low. However, class 3 bluetooth devices can transmit at up to 100mw, which could be detrimental to all WLAN channels within range. Having said that, bluetooth devices are often mobile and so you often have little control over them, which might be why that is not considered a best practice.

upvoted 1 times

...