If a 24-port switch has a PoE budget of 740 W, how many IEEE 802.3at devices can certainly be powered on by it?

What type of site survey helps determine if roaming is functioning as intended?

What is the meaning of a Real Time FFT graph?

If radar has reportedly been detected on your WLAN deployment, what bands would you consider avoiding?

What kind of antenna results in a nearly circular pattern on the azimuth chart but a very flat donut shape on the elevation chart?

After deploying a 5 GHz-only WLAN infrastructure in the USA, using 20 MHz channel-widths and all 25 available channels, one of the managers of the company brings his 802.11n tablet to the office to test the Guest SSID. While testing, there were several spots where he would get poor RSSI (below -80 dBm) or none at all. You checked the WLAN infrastructure and all APs are up and running and you've validated coverage after deployment. What is causing this issue?

When deploying a new WLAN infrastructure using PoE to power the APs, you realize that a known good AP is not powering up. You use the same cable to connect your laptop and connect without any trouble. What is the most likely reason the AP did not power up?

When using a predictive design tool, you have selected APs with an antenna gain of 3 dBi and set the transmit power of the predicted APs to 25 mW. What should be the EIRP of the APs in the design?

Main Topic:Infrastructure Design

Question:

A signal passes through a 10-meter cable, an amplifier, and then a filter. The amplifier has an output that is eight times higher in power than its input. Each meter of cable reduces the signal level by a factor of 4. The filter has a loss of 5 dB.

What is the total loss/gain of the three elements in series?

Why does a frame transmitted at 1 Mbps have a greater usable range than the same frame transmitted at 54 Mbps?

After designing a WLAN infrastructure using predictive design software. What's the best way to validate the predictive design in the physical space before deployment, if time and budget allow for it?

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?

Main Topic:Infrastructure Design

Question:

What is the minimum PoE budget needed on a switch to support 6 (six) APs that can only be powered using IEEE 802.3at if no other details are provided?

When deploying an Enterprise-class VoWLAN infrastructure, which Access Category (AC) must be used to prioritize voice packets and ensure optimal performance?

You are testing a VoWLAN deployment, and your communication measurements show a certain amount of lost packets. What would be an acceptable packet error rate value to still provide acceptable call quality?

Excessive uplink RTP frame retransmissions can result in ____________.

What are the two types of WLAN discovery/scanning?

In a convention center, you have received complaints about the WLAN infrastructure. At this moment, there are only two APs in one auditorium. After analyzing the situation, you determined that there are more client devices than 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?

Main Topic:Post-Design ValidationandTroubleshooting

Question:

Excessive uplink RTP frame retransmissions can result in ____________.

Prior to meeting with the customer for the first time, you should do which of the following?

When troubleshooting coverage issues for a wireless network as it appears to new client associations, you should perform which type of survey?

Which definition correctly describes the "local MAC" variation of the centralized WLAN architecture?

What advantage provided by 802.11n and 802.11ac is not usable in 1x1:1 low-end client devices?

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?

Why should band steering algorithms allow stations to connect to the 2.4 GHz band after some number of ignored Probe Requests?

In what circumstance would you not enable DFS channels on a WLAN infrastructure?

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?

What frequency and power did 802.11y provide?

In a convention center, you have received complaints about the WLAN infrastructure. At this moment, there are only two APs in one auditorium. After analyzing the situation, you determined that there are more client devices than the infrastructure was designed for. There are only two APs to support more than 300 devices using Wi-Fi at the same time. What should you do to make the Wi-Fi work as expected?

What are the two most common industry-standard protocols used to transport data from an AP to a Wireless LAN Controller?

During a public Wi-Fi session with 10 other users, you run a ping sweep but cannot detect any devices on your subnet. What feature is likely enabled on the WLAN infrastructure to prevent local communication between clients?

During lunch time in the break room of a company, Wi-Fi connectivity on the 2.4 GHz band becomes intermittent. At other times of the day, it works fine. What is the most likely cause of this issue?

After designing and deploying a WLAN infrastructure, you realized the CCI is causing poor performance in the 2.4 GHz band. Primarily, you've designed the WLAN for 5 GHz and 2.4 GHz as a best effort. You found out that the implementers didn't follow your guidelines when configuring the WLAN infrastructure. What can you do to minimize as much as possible the CCI impact in the 2.4 GHz band?

An AP vendor being considered for a WLAN deployment suggests that their 2.4 GHz and 5 GHz dual-band APs use software-defined radios. What unique capability does this indicate in comparison to non-software defined radios?

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?

An organization is implementing a new WLAN. They are upgrading a very old 802.11g network that only a few devices used. Now, they expect more than 250 devices to use the new WLAN that will operate 802.11ax APs. What wired-side consideration should you address in your design recommendations?

What commonly causes a client-to-AP link imbalance?

A table of VLANs in a _________ document should include what device performs ________ services.

If the amplifier in Question 4 has a noise figure of 10 dB but a gain of 0 dB, what is the total noise figure of the cable, amplifier, and filter in series?

Which of the following items could be considered constraints when performing a network design? (Choose all that apply.)

What is the purpose of Friis transmission equation [ (LdB) = 20 log(d) + 20 log (f) - 27.55 ]?

Main Topic:Post-Design ValidationandTroubleshooting

Question:

iPerf is a tool used in site surveys and validation surveys for what purpose?

You are planning for client devices in a WLAN that is to be upgraded to 802.11ac. Which one of the following devices is more likely to have support for 3x3:3 radios and 256 QAM?

What is the purpose of defining wall materials in WLAN design software?

During an RFP analysis, one of the vendors mentioned that you'll need to upgrade your Gigabit Ethernet switches to MultiGig switches to ensure support for 802.11ac and 802.11ax, which both offer data rates over 1 Gbps. Why is this not sound advice?

Given: A project parameter defines a requirement or constraint for a project that can be defined before any file imports or design actions. What is an example of a project parameter commonly available in WLAN design software?

After importing a floor plan to a predictive design tool, what should be done prior to adding APs, antennas, and attenuators (e.g., walls)?

The installation crew for your WLAN project wants to install a few APs to locations nearby the ones specified in the RF design document. What next step should occur?

You are evaluating CCI (Co-Channel Interference) impact in 2.4 GHz. During the post-validation survey, you determine that 2 or 3 APs are seen from every location in the 2.4 GHz band with signal strengths above −75 dBm from all seen APs. Does this show that CCI has been removed from the environment given that three non-overlapping channels exist in 2.4 GHz and why?

When selecting a centralized WLAN architecture, what new problem may arise when you change the data forwarding model from centralized to distributed?

Given:For this fill-in-the-blank question, each answer option contains an answer for the first and second blanks, separated by a dash "—". Choose the answer option that correctly fills in both blanks in the following sentence.

A WLAN may use 802.11 admission control to ________, and admission control requirements are configured separately for each ________.

Main Topic:Infrastructure Design

Question:

What are methods of providing RF high availability?

While planning for a VoWLAN deployment requiring 25 dB SNR, you measure the noise floor at -88 dBm. What is the minimum RSSI needed to meet the system's performance requirements?

After successfully deploying and validating a WLAN infrastructure, who should be trained for a better understanding and management of the solution? (Choose the single best answer)

What roaming technology uses stored keys at the APs for roam back if a client STA returns after having roamed away?

When deploying a new WLAN infrastructure using Power over Ethernet (PoE) to power the access points (APs), you find that a known good AP is not powering up. You connect your laptop using the same cable without any issues. What is the most likely reason the AP did not power up?

When a WLAN controller sends an 802.11 frame to a lightweight AP for transmission on the wireless medium, how does it mark the frame for 802.11 QoS priority?

As a device starts to shift to lower PHY rates, what factors usually influence a device’s decision to shift to lower PHY rates? (Choose all that apply.)

What metric implements the simplest algorithm and lowest accuracy in networks requiring locations?

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?

Main Topic:Post-Design ValidationandTroubleshooting

Question:

One of your warehouse customers called you reporting problems with their WLAN in some locations that you designed and installed over a year ago. What should be one of your first considerations for your line of questioning?

While conducting a site survey in a heavy machinery repair facility, what essential gear should you use for safety in this challenging environment?

What limitation exists when WMM is not enabled on an 802.11 WLAN?

Your customer requires a security solution where client credentials are used, not a Protected Access Credential (PAC), and the authentication server must have a certificate with optional client certificate use. Which EAP (Extensible Authentication Protocol) method is the best fit for these requirements?

Main Topic:ProtocolandSpectrum Analysis

Question:

What is the chip rate of 1 Mbps 802.11b?

What are some significant drawbacks that are present with WPA/WPA2-Enterprise that are not present with WPA/WPA2-Personal? (Choose all that apply.)

What best describes ensuring coverage requirements in a deployed WLAN?

According to IEEE 29148-2018, which of the following is a characteristic of a requirements set that is not a characteristic of an individual requirement statement?

Which document provided to your customer should include all devices and parts that are going to be used during the deployment of their WLAN infrastructure?

Which one of the following options is a dedicated throughput testing application, usable on both the WLAN and LAN?

Before connecting, mounting, and powering 213 total controller-based APs, what action should be taken to ensure that they are configured by the controller once powered on and connected to the network?

What should you do during the design process of a point-to-point bridge link to minimize CCI and ACI?

Main Topic:Post-Design ValidationandTroubleshooting

Question:

When viewing channel utilization information from a protocol analyzer, if high channel utilization is occurring, what should you ensure does not exist?

Main Topic:Designing for Specific Applications

Question:

When live video streaming solutions that transmit simultaneously to more than one recipient are used, what special capability should be considered and configured in all affected WLAN implementations?

What are the best practices for better location accuracy when deploying Wi-Fi RTLS?

Main Topic:Wireless Design Process

Question:

When designing for a PTP outdoor link, what important consideration should be made about local vegetation? (Choose all that apply.)

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?

When performing an indoor predictive site survey to make the WLAN planning and design cycle more efficient, what is a best practice for configuration of the simulated APs in the predictive modeling software?

In this question, you will compare the mobility processes of a network that supports WPA2-Personal and WPA2-Enterprise. Assume the use of a 15-character ASCII passphrase for WPA2-Personal and EAP-TTLS/MSCHAPv2 with WPA2-Enterprise. Also, assume that proprietary roaming protocols are not supported. When a device transitions from one BSS to another within the same ESS, what step must be performed in the WPA2-Enterprise transition that is not performed in the WPA2-Personal transition?

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?

You are site surveying a network for VoWiFi. You have positioned an AP for a manual survey and are moving away from the AP with a phone in Survey Mode in your hand and you are reading the RSSI value of the signal received from the AP. You have previously determined that the noise floor was approximately -94 dBm on this floor of the building. The phone's documentation does not specify a recommended RSSI or SNR value for best performance. Based on the information provided and the type of device (VoWiFi phone) you are deploying, what minimum RSSI should you plan for in all areas you are monitoring and where VoWiFi service is desired?

What limitation exists when WMM is not enabled on an 802.11n WLAN?

You are selecting external antennas for use in a bridge link deployment. What chart should you request from the antenna vendors to make an accurate selection?

Using a Single Channel Architecture (SCA) means that all APs will be using the same channel in a given layer. How is the AP with which the client associates determined?

An MSA commonly addresses at least which two legal categories?

Main Topic:Advanced Site Surveys

Question:

When performing an indoor predictive site survey to make the WLAN planning and design cycle more efficient, what is a best practice for configuration of the simulated APs in the predictive modeling software?

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 is the minimum PoE budget required to power 6 APs using IEEE 802.3at with no additional details provided?

What VoWiFi implementations frequently require multicast packet delivery support by the WLAN infrastructure?

What document is typically created to launch a project?

You are conducting a physical site survey where heavy machinery is repaired. What is a common item required specifically for this type of survey?

What commonly used item can help to prevent back pain during lengthy site surveys?

Given: You are evaluating the theoretical and real-world RF gain benefits of transmit and receive features introduced by 802.11 with MIMO. This

exercise allows you to quantify the features value in a real-world environment.

What is the maximum theoretical signal gain of chip-based TxBF and MRC (as features) when compared to the same AP using only a single

antenna for transmit and receive (effectively simulating a 1x1 chip)?

Main Topic:Post-Design ValidationandTroubleshooting

Question:

For what types of systems should you request read-only access to in order to perform an analysis of the customer’s existing infrastructure? (Choose all that apply.)

When designing a WLAN to support voice in a large office, which design element is of the highest concern for performance?