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A customer is acquiring a new VoWLAN system to replace their existing wired phone system. When reading about his system's requirements, you
learned that is requires 25 db of SNR to work as expected. After surveying the environment, you discovered that the noise floor is -88 dBm. What
should be the minimum RSSI value to meet the system's requirements?
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:
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 statement is true of a WLAN design that supports Real-Time Location Services (RTLS) with 802.11 RFID asset tags?
While configuring your site survey software for an upcoming manual survey project, you notice the configuration option for "Network Card
Simulation". What is the purpose of such a feature and when would you use it?
When creating a long-distance bridge link, it is important to know the channels in use by other networks on both ends of the link and within a reasonable range It is not as Important to know the channels in use in the middle area of the link. Why is this the case?
As a device starts to shift to lower PHY rates, what factors usually influence a device decision to shift to lower PHY rates?(Choose all that apply.)
During a post-deployment verification, you are requested to troubleshoot an area where users are experiencing poor throughput. They are using
data communication only, mainly from laptops. You captured the frame showing an incorrect FCS. This frame is typical of those that were
captured by the analyzer.
What does this frame reveal about the RF network in this area?
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?
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?
What strategy can be used to ensure efficient cell overlap for VoIP site surveys?
Response:
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 phones 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 should you do during the design process of a point to point bridge link to minimize CCI and ACl?
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?
After successfully deploying and validating a WLAN intra structure, who should be trained for a better understanding and management of the solution? (Choose the single best answer)
What is the most cost-effective way to accurately measure the height of a ceiling when ladder use is not allowed?
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:
SSID hiding is not generally recommended because some frames require inclusion of the SSID. In what frames is the SSID always included?
Response:
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?
What advantage provided by 802.11n and 802.11ac is not usable in 1X1:1 low-end client devices?
In addition to a copy of your design, which tools should you use to ensure the installation team deploys APs where you have them designed to be
located?
An engineering firm just upgraded their WLAN form nine 802.11n APS to nine 802.11ac APs. After this upgrade, they did not see any improvement
in throughput.
What is the most likely cause of this result?
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 lo the network''
You are designing a WLAN and nave been asked to recommend a security solution for the network The organization requires that 802 1X/EAP be implemented, but they do not have a PKI and do not wish to deploy one They suggest that mostly Windows clients. Apple phones and Android phones will be used What do you recommend?
What VoWiFi implementations frequently require multicast packet delivery support by the WLAN infrastructure?
You ate evaluating CO 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 CO has been removed from the environment given that three non-overlapping channels exist in 2.4 GHz and why?
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?
Response:
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?
As a device starts to shift to lower PHY rates, what factors usually influence a device decision to shift to lower PHY rates?(Choose all that apply.)
Response:
What architecture suffers the biggest limitation for sharing control information across APs?
Response:
When implementing multiple SSIDs to what is each SSID typically mapped in order to provide traffic management separately for each SSID?
A table of VLANs in a _________ document should include what device performs ________ services.(Fill in the blanks)
Response:
While performing a validation site survey, you realize that overlapping channels are being used on the 2.4 GHz bad due to the automatic channel assignment algorithm of the WLAN infrastructure.
What should you do to prevent this?
Response:
What type of protection should be provided to outdoor antenna installations?
Response:
Given: As the wireless network administrator for XYZ Company, you are planning to upgrade your aging wireless network infrastructure, as well as
some clients, to support 802.11ac. In your research, you have discovered that your new wireless client devices and infrastructure are 802.11ac,
WMM, and WMM-PS certified by the Wi-Fi Alliance. Some of your existing client devices are 802.11a/b/g devices that do not support WMM.
Given this information, what scenario is possible when your company's employees begin using both types of client devices on the new WLAN?
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?
A high power radio system transmits at 40,000 Watts. What is this power in dBm? Solve this without a calculator.
Response:
What is the best method of gathering attenuation measurements from any building materials or objects?
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?
Response:
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?
Left to its simplest form, what method does a location algorithm use to determine location within a WLAN coverage area?
Response:
Your customer requires a security solution in which client credentials are used and the authentication server must have a certificate with optional
client certificate use. Which EAP method would be the best fit for their requirement?
Location technology (RTLS) can use which of the following methods?(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?
What are some common problems with short (12 or fewer characters) ASCII passphrases in WPA/WPA2-Personal networks?
Response:
Given:
In your regulatory domain, a Tx Power Level of "1" is equivalent to 17 dBm.
For every integer increment (e.g. from 1 to 2) to the Tx Power Level, the APs transmit power is halved.
In units of mW, what is the actual transmit power for an AP configured at a Tx Power Level of "4"?
You have designed a WLAN with a plan for 87 APs m a large office building. The customer has informed you that the budget is not as large as they hoped and they can only purchase 53 APs What action should be taken?
A wireless engineer from your company performed a site survey in an office building where a wireless network extension was needed. He reports
that while performing a Layer 1 sweep near a meeting room full of people, he detected RF activity with a very low duty cycle. He is unsure how to
interpret what he recorded to determine its impact on a future Wi-Fi network.
What is true about this RF environment and its potential impact on the WLAN?
For what purposes are VPNs typically used in modern WLANs?(Choose all that apply.)
Response:
When analyzing published competitive tests by equipment vendors, what items are the tests usually lacking?(Choose all that apply.)
Response:
When troubleshooting coverage issues for a wireless network as it appears to new client associations, you should perform which type of survey?
Response:
Switches and APs have already been chosen by your customer. All switches support 802.3bz MultiGig interfaces and APs are 4x4:4 802.11ac
wave 2 capable of using dual-5GHz and have one MultiGig interface. Some cable drops for the APs will run for more than 180.5 feet (or 55
meters). To support MultiGig, what is the best choice of cabling?
Install technicians are deploying a multi-floor WLAN that you have designed They have finished the first floor and all APs on that floor are powered on and functioning No APs on any other floors have been deployed at this time You are considering performing a post-deployment site survey of the first floor immediately to validate proper implementation What statement is true about this site survey if you perform it?
What inexpensive tool is capable of locating neighbor WLANs if that is your only need?
How can you increase efficiency in an 802 11n 2.4 GHz multiple-channel architecture network?
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?
Who should be in the final meeting from the customer-side after successfully implementing a WLAN infrastructure?
What are the two most common industry-standard protocols used to transport data from an AP to a Wireless LAN Controller?
Looking at a client radio specification sheet that states Receive Sensitivity of −82 dBm @ 18 Mbps would mean:
Response:
Which one of the following options would you consider a well-designed WLAN infrastructure when measuring RSSI Notse floor and SNR in a required area?
Low RSSI, Low Noise Floor Low SNR
High RSSI, Low Noise Floor High SNR
High RSSI, High Noise Floor Low SNR
Low RSSI, High Noise Floor Low SNR
Before performing a pre-deployment passive RF survey of a new deployment using survey mapping software, which of the following must be performed?
The thermal noise is at −174 dBm/Hz. A spectrum analyzer has a resolution bandwidth of 1 kHz and a 5 dB noise figure. What is the level of the noise floor?
Response:
What metric implements the simplest algorithm and lowest accuracy in networks requiring locations?
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If you choose to recommend dynamic channel assignment for the APs in your WLAN design what action should you also recommend'?
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?
Response:
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?
Response:
In a PC-based spectrum analyzer, what data chart identifies the overall RF utilization of a specific frequency in the environment being surveyed?
TESTED 23 Nov 2024