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When installing APs on high ceilings, what should be the most common PPE to be used?
Your customer is using PSK as their only authentication. They have an industry requirement to move to a stronger solution. Your recommendation
is to move to a certificate-based type of authentication where both the client and server require certificates. Which EAP type would be the best fit?
What might limit the ability to locate 802.11 clients using a WLAN infrastructure without an 802.11 tag?
A table of VLANs in a _________ document should include what device performs ________ services.(Fill in the blanks)
Response:
A company wants to connect its headquarters to its remote office that is 13 kilometers away using a wireless bridge. What requirement must not
be forgotten by their Wireless Engineer when considering the Fresnel Zone?
Why does a frame transmitted at 1 Mbps have a greater usable range than the same frame transmitted at 54 Mbps?
What type of protection should be provided to outdoor antenna installations?
Response:
You are creating an outdoor bridge link that spans more than 1000 yards. Which one of the following antenna types is more likely to be included in
the design?
In your company’s WLAN, you expect to have a mixed client PHY environment and plan to use protection mechanisms. The protection mechanism used by your client devices is configurable.
What is the best protection mechanism for backward compatibility of 802.11n devices with 802.11b devices?
Response:
A high power radio system transmits at 40,000 Watts. What is this power in dBm? Solve this without a calculator.
Response:
A bandpass filter has a maximum in-band loss of 1.5 dB, ripple of 0.4 dB, and a return loss of 15 dB. What is the minimum in-band loss?
Response:
You are tasked with designing the WLAN to accommodate certain high density areas on your university campus where users frequently come and
go. With a limited DHCP pool size (subnet mask = 255.255.252.0) for this WLAN subnet, you want to ensure that your DHCP addresses are used
efficiently and are not exhausted, which would prevent new client Layer 3 connections. The DHCP server is a Windows Server 2012 R2 machine.
Your design task is to determine the best configuration to allow as many users as possible while avoiding WLAN service interruptions and also to
use the available addresses as efficiently as possible.
What setting would be most effective at achieving this design task?
What is the most suitable antenna option to be used when designing a WLAN infrastructure with APs mounted on a ceiling with a height of more
than 20 feet and having all of the client stations used from the floor?
Assume that your network operates in a regulatory domain that allows use of the entire 5 GHz space allowed in the 802.11ac amendment. In your
upcoming
802.11ac deployment, you would like to take advantage of the performance improvements that result from channel bonding. However, after
extensive testing, you have determined that your mission-critical WLAN should not use channels requiring DFS support.
Given those two criteria (enable channel bonding and disable DFS channels), in the 5 GHz spectrum, how many non-overlapping 40 MHz channels
will your system be able to use?
You told your customer that multipath fading may be mitigated simply by moving one or both of the receivers antennas a small amount, usually by
one to four wavelengths away from its original position. Your customer is prepared to make the change, but does not know the wavelength for
802.11ac.
What is the approximate wavelength of an 802.11ac radio wave?
For what purposes are VPNs typically used in modern WLANs?(Choose all that apply.)
Response:
What document should be created that provides instructions for install technicians to mount and configure APs?
A museum wants to offer Wi-Fi to its visitors. One of their requirements is to have the APs blend into the design of the museum. What should you
do to meet this requirement?
NicoCo is building a new facility and would like to install a WLAN for primary connectivity of all clients. The requirements are dual-spectrum 802.11n supporting voice and location tracking.
What type of pre-deployment survey should be performed?
Response:
What part of the 802.11n preamble is used by the receiver to estimate the spatially multiplexed signal channel? What mode is this used in?
Response:
When designing a static channel plan for an office using voice devices near an airport, which range of channels should be avoided to ensure
optimal performance when implemented?
You desire to achieve a 450 Mbps MCS. What 802.11n features (from the numbered list below) are required?
1. Frame aggregation
2. Short GI
3. 40 MHz channels
4. 2 spatial streams
5. 3 spatial streams
6. Transmit beamforming (TxBF)
What are some significant drawbacks that are present with WPA/WPA2-Enterprise that are not present with WPA/WPA2-Personal?(Choose all that apply.)
Response:
ABC Manufacturing has a heavily-used dual-band (2.4 / 5 GHz) WLAN, but sporadic RF interference across the 2.4 GHz band is causing dropped
VoWiFi calls and leading to data connectivity and throughput problems.
In addition to avoiding 2.4 GHz channels and installing a distributed spectrum analyzer to locate RF interference sources, what should the
implementer do to resolve the problem fully?
What action should be taken after implementing a WLAN based on the design developed from the site survey process?
Which one of the following is an essential metric to measure when performing a survey and design for VoIP across WLANs?
After importing a floor plan to a predictive design tool, what should be done prior to adding APs, antennas and attenuators (e.g., walls)?
When you see the SKINNY protocol in a post-install validation protocol capture, what does this indicate?
You performed a site survey with two USB Wi-Fi adapters using a special driver written for the site survey software. After deployment, you realized
that the client devices used by your customer are getting lower RSSI values than that shown during your site survey. What is the most likely reason
for this result?
Which DHCP option, when required, should be configured and enabled to help APs locate their wireless LAN controller?
In a multiple channel architecture (MCA) network supporting 802.1X authentication, what aspect of WLAN design affects client roaming efficiency
and effectiveness?
During a validation site survey, you realize that the installers mounted some of the APs above the ceiling. They said that this was a request from
the building architect due to aesthetics constraints. During the requirements gathering, you weren't advised about any aesthetics constraints from
the main stakeholder of the project. What should you do in this case?
In a convention center, you have received complaints about the WLAN infrastructure. At this moment, the are only two APs in one auditorium.
After analyzing the situation, you determined that there are more client devices that the infrastructure was designed for. There are only two APs to support more than 300 devices using the Wi-Fi at the same time.
What should you do to make the Wi-Fi work as expected?
Response:
What term refers to the security practice of obfuscating actual data from unintended receivers as the data crosses the transmission medium?
Response:
When preparing a floor plan graphic for use in predictive and manual site surveying, what calibration method will lead to the most accurate and
reliable RF data?
A controller-based WLAN infrastructure has its controller on a different subnet than its APs. What device must be used to enable any
communication between the
Controller and the APs?
What architecture suffers the biggest limitation for sharing control information across APs?
Response:
You have performed a validation site survey after deploying a WLAN infrastructure that is an All-Wireless-Office. One specific application of your
customer is experiencing delay when using the application after moving from wired connectivity. After your validation, you realized that all APs are
using 80 MHz channel- widths instead of 20 MHz on the 5 GHz band, as it was designed. What can be done to resolve the delay on this
application?
ABC Company has a WLAN controller with 10 controller-based APs; the Voice SSID is configured for centralized data forwarding. Each AP is
connected to an access port on a layer-2 Ethernet switch. Each layer-2 switch is uplinked to a single layer-3 core Ethernet switch. The WLAN
controller is connected directly to the layer-3 core Ethernet switch. Layer-3 tunnels are created between all controller-based APs and the WLAN
controller. A voice server is connected to the layer-3
Ethernet switch.
When a voice-enabled QoS STA sends an IP data packet to a voice server in this scenario, the DSCP value carried in the STA's IP data packet gets
mapped to what and by which device?
During lunch time in the break room of a company, Wi-Fi connectivity on the 2.4 GHz band is intermittent. Every other time of the day, it works fine.
What's the likely cause of this issue?
Which type of authentication and encryption method is mandatory for Voice Enterprise certified devices as specified by the Wi-Fi Alliance?
Before performing a pre-deployment passive RF survey of a new deployment using survey mapping software, which of the following must be performed?
A business traveler from North America is in Europe. The hotel only provides coverage in 2.4 GHz. The traveler connects to the hotel's SSID and notices an AP in the hotel room.
However, the laptop reports a very low RSSI when connected. The traveler does not have the same problem when connecting in the lobby.
What would be the most likely cause of the low RSSI in the hotel room?
Response:
In what circumstance would you not enable DFS channels on a WLAN infrastructure?
What factors are key features when designing a guest network for a large enterprise?(Choose all that apply.)
Response:
In a large enterprise (5000+ wireless users), by what would NOT be a recommended method by which IP addresses and VLANs are assigned to
different clients associated to the same AP?
In a manufacturing facility with highly reflective materials, you are planning an upgrade to your existing 802.11b WLAN implementation. You have
chosen a dual- band 802.11n infrastructure product for this purpose. Your client applications include:
✑Handheld scanners for inventory management
✑Toughbooks (laptops) mounted on forklifts for inventory and workflow management
✑VoWiFi phones used by select employees throughout the facility
You are evaluating all of the 802.11n enhancements and determining which features to enable for your environment and applications.
In this scenario, what 802.11n enhancement typically should NOT be enabled on the 2.4 GHz radio of the new APs?
What metric implements the simplest algorithm and lowest accuracy in networks requiring locations?
Response:
What VoWiFi implementations frequently require multicast packet delivery support by the WLAN infrastructure?
What advantages are provided by per-user PSKs when compared with ESS-wide PSKs?(Choose all that apply.)
Response:
Your customer requires fast secure roaming. Which two types of roaming are specified in 802.11-2016 FT roaming that will help meet this goal?
A museum wants to offer Wi-Fi to its visitors. One of their requirements is to have the APs blend into the design of the museum. What should you do to meet this requirement?
Response:
How much more power can a 1 Mbps 802.11b signal have than a 54 Mbps 802.11g signal if it is sent through a saturated amplifier?
Response:
What kind of site survey helps you identify if roaming is working as designed?
Your new customer is concerned about maintaining privacy for their proprietary information when you conduct information gathering for their
WLAN design. Which document can you use to directly address their concern?
TESTED 07 May 2024