Online Access Free 300-360 Exam Questions

No.# this should be B -

Higher gain antennas spread the signal on the horizontal plane, which creates a larger cell that also picks
up more noise. This results in a lower signal-to-noise ratio (SNR), which increases the packet error ratio.
SNR is defined by the following two criteria:
• Signal—The radiated energy transmitted from one radio that can be received uninterrupted by
another radio. For Wi-Fi, this means that the transmitting radio is sending 802.11 protocol packets
that the receiving radio is able to decode.
• Noise—Transmitted energy in the frequency range of the receiving radio that cannot be decoded by
that radio.
The larger the difference in energy between the protocol packet and the background noise, the better the
reception of the protocol packet and the lower the packet error rate and bit error rate. Coverage area
design involves using channels to create the lowest possible packet error rate while maintaining a high
call capacity.
Higher gain antennas can also reduce the number of calls on a Wi-Fi channel because of the increased
coverage area. For voice, a ceiling-mounted antenna is preferred over a wall-mounted patch because the
human head and body attenuate 5 dB of the signal (see Figure 9-1). Ceiling mounted antennas are better
positioned to avoid more of this head and body attenuation than most wall-mounted antennas.

No.# Cisco.Press.CCNP.Wireless.642-732.CUWSS.Quick.Reference.2nd.Edition.May.2012 Page 33 -

Also check for areas that may be difficult to access (for example, clean rooms in hospitals, hard-to-reach areas, hazardous environments with nearby chemicals or machinery, outdoor APs on poles in busy streets) and may require specific conditions for access (specific time slots or equipment).

No.# I think it is A Enable Band Select on the WLAN I am confused too but here it says:
https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Mobility/vowlan/41dg/vowlan41dg-book/vowlan_ch10.html?bookSearch=true

The recommended method used to limit the Cisco Unified Wireless IP Phone 7921 operation to a single frequency band is to leave the phones at their default setting and to configure the WLAN on the controller—or Cisco Wireless Control System (WCS)—to operate on the required frequency band.

Then here it says about band select:
https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Mobility/vowlan/41dg/vowlan41dg-book/vowlan_ch10.html?bookSearch=true
Band selection enables client radios that are capable of dual-band (2.4- and 5-GHz) operation to move to a less congested 5-GHz access point. The 2.4-GHz band is often congested

No.# D is the right answer

No.# VoIP REQUIRES overlap, therefore B is NOT the answer. D is the correct one.

No.# The test answer is B, but in the real world it would be D. Today's OR's can often use wireless transmitters and sensors during operations. Any Engineer worth their salt would insist on returning to complete these areas, rather than rely on a Predictive tool of any kind!

No.# The question says WHITE not GRAY. Gray would be A, but White is B. Fire up Ekahau and see for yourselves. The correct answer is B. No data, no color!

No.# my understanding is:
if you have channel overlap, you will get more CCI co channel interference.. so B is correct..
you do however want some cell overlap for roaming.. so no overlap must mean no cell overlap..

No.# I agree answer is "FCC OET Bulletin 65, Evaluating Compliance with FCC Guidelines for Human Exposure to Radio Frequency Electromagnetic Fields"

https://transition.fcc.gov/Bureaus/Engineering_Technology/Documents/bulletins/oet65/oet65.pdf

BUT note B is FCC QET Bulletin 65 .... NOT OET
hope its a typo

No.# Please note, there are 2 questions on the test.. I got both..
1. relates to 802.11k
2. relates to 802.11r

the first part of the question (that actually answers the question for you) IS NOT on the real test..

No.# sbcoms
I agree. But please see how B is "number of uses" not "number of users"
I am curious if this is a typo.. OR if it could refer to duty cycle..
Which from what I understand relates to what percentage of users will be accessing the wireless network
In the bowl of the stadium, most likely there will be a lower % of users on the wifi network w peaks during intermissions.. I would like to think the same is true for in the suites.
But either way, I still agree that answers are

A. device types
B. number of uses/users

No.# https://www.cisco.com/c/dam/global/cs_cz/assets/ciscoconnect/2014/assets/tech_wlan_design_ics_jc.pdf
slide 10
highest redundancy is 7.5 code supporting client SSO
also least number of controllers
and easiest to manage

No.# i cannot find any evidence anywhere that states "The phones only operate on the 2.4 GHz band when the power level is above 25 mW"

So I think that one of the answers should not be C..

No.# Answer is correct.
Don't get confused with OSHA 1910.97-- OSHA refers to RF as a hazardous environment. The question asks wrt "human exposure"
FCC OET Bulletin 65, Evaluating Compliance with FCC Guidelines for Human Exposure to Radio Frequency Electromagnetic Fields, provides assistance in determining whether proposed or existing transmitting facilities, operations, or devices comply with FCC limits for human exposure to RF fields. The bulletin offers guidelines and suggestions for evaluating compliance and establishes MPE limits.

No.# The answer is not clear cut. Correct me if I'm wrong.
The question states " he or she should not enter any active surgery suites" emphasis on NOT and ACTIVE. So if they are not allowed in, how can they do passive surveys? They can not enter as the surgery suites are active, meaning actively busy with surgery/operations.

Would this then not be the same as the warehouse where an area were not accessible due to obstruction. In this case they are not allowed in/couldn't enter.

A passive survey can't be done. So then the correct answer will be B. (WCS tool)

No.# Agree - doubt that D is correct.

"In a location-ready design, it is important to ensure that access points are not clustered in the interior and toward the center of floors. Rather, perimeter access points should complement access points that are located within floor interior areas. Access points should also be placed in each of the four corners of the floor, and at any other corners that are encountered along the floor perimeter. These perimeter access points play a vital role in ensuring good location fidelity within the areas they encircle, and may participate in the provisioning of general voice or data coverage."

No.# Corect answer is A ---- 1, 5, 9, 13 for ETSI.
FCC uses 1,6,11 and Japan uses additional channel 14, a licence is needed to use Ch14 in Japan
" Japan has 14 usable channels in the 2.4 GHz ISM band, but a license is required to use the 14th channel."

****2.4 GHz Three or Four Channels****
• 25 MHz separated channels are 802.11 compliant
• 20 MHz separated channels allow four channels in ETSI domain
• Noise floor is higher
• ETSI power level is lower than FCC; noise floor is still low, but SNR is degraded
• Acceptable for OFDM, data indoor networks

The concern behind the channel separation is performance, so that a signal coming from an adjacent channel has as little impact as possible on the current channel clients. For this reason, channels should be as far apart as possible. Beyond the 802.11 specification, the real impact of adjacent channel traffic depends on the AP power. An AP with a higher power level has a stronger signal, and therefore more impact on the adjacent channel than an AP with lower power. Although the signal attenuation is the same in percentage, it will not be the same in value. Suppose that you have an AP on channel 1 sending a signal at 17 dBm. Another AP set to channel 6 will receive a signal at least 28 dB weaker, therefore –11 dBm. If the first AP on channel 1 is sending at 14 dBm instead of 17 dBm, although the attenuation is still at least 28 dB, the resulting signal on channel 6 is heard at –14 dBm. This logic brought several vendors and wireless professionals in the ETSI domain to extend the attenuation concept beyond the protocol specification. The reasoning is that, as power levels are lower in the ETSI domain than in the FCC domain, the effect of AP signals on adjacent channels would be less in the ETSI domain than in the FCC domain. Therefore, it is common in the ETSI domain to see deployments using OFDM ("pure 802.11g," and not 802.11b/g), using channels 1, 5, 9, and 13. This configuration allows for four "almost-adjacent" channels in the same space, and therefore allows for more clients in the same physical space. The downside is twofold:
• The deployment is not really 802.11 compliant anymore because the channel separation is not 25 MHz but 20 MHz. This lack of compliance is not really a technical problem because clients can associate the same way.
• Although the resulting impact on the adjacent channels is less with a lower power level, the initial signal itself being less powerful, the result is a lower SNR. The absolute impact of one channel to the next channel is less at lower power, but the relative impact (relative to each channel signal level) and the energy overlap percentage are the same. The result of using four channels is to raise the noise floor in that given environment.
Although this deployment is acceptable for data networks, the rise of the noise floor renders this type of configuration unacceptable for VoWLAN deployments, where one concern is to maintain a high SNR, even at the cell edge....

No.# Agree, can't be access point density required as their is no survey done and the customer wont be able to say what the density must be.
Suggestions for what the checklist, at a minimum, should contain:
• Customer contact information
• Total number of sites
• Number of buildings per site
• Hours of operation
• Hours during which the site survey can be performed
• Approximate square footage of facility
• Total number of users, minimum and maximum
• Packet size, average and maximum
• RF coverage information:
1. RF coverage inside and outside
2. Complete or selective RF coverage
3. Encryption to be utilized
4. Rate-shifting utilization
• Network infrastructure:
1. Existing network topology
2. Network speed 10/100/1000BASE-TX
3. Copper or fiber network media
4. If copper, Category 5 or Category 6 cabling
Site information:
• Ceiling heights
• Racking or shelving? If yes, describe construction
• Clearance above storage level
• Any hazardous areas?
• Is there a lift available?
• Special safety requirements such as steel-toe boots, hard hat, or safety glasses
• Is this a union facility?
• Is other non-WLAN RF equipment installed at the facility?
1. If so, which frequencies does the equipment use?
• Three main categories:
1. General questionnaire
2. Vertical specific
3. Technology-specific questionnaire
• Wi-Fi questionnaires may include:
1. General information
2. Location (site) information
3. Application information
4. Capacity information
Wi-Fi customer questionnaires may be used to request the following details from a customer:
• General information
• Location (site) information
• Application information
• Capacity information


David

No.# i highly doubt this is the correct answer , i think it should be int the perimeter of each floor and this is how we reach the deployment of location based, as 3 APs need to track the object for accuracy and all, but putting it in the center of each floor doesn't have any taste and doesn't sound right at all!!!!

No.# yes the correct answer is A for sure
http://www.radio-electronics.com/info/wireless/wi-fi/80211-channels-number-frequencies-bandwidth.php

go to
2.4 GHz WLAN / Wi-Fi Channel availability