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For an antenna 35 dBi of gain is needed. What antenna type should be used to achieve this gain?
Response:
You and 10 other people are connected to a public hot-spot. You issue a ping sweep on the network, but you can't find any devices on the same
subnet as yours.
What feature might be enabled on the WLAN infrastructure that is preventing you from communicating with other devices on that subnet?
You are configuring an 802.11ac AP using manual channel planning. The design specification calls for the current AP to be placed on channel 56 in 5 GHz and to disable the 2.4 GHz radio.
For what could the 2.4 GHz radio be used if not standard AP operations?
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In an RSN requiring low-latency reassociations and no fast secure roaming protocols, what security solutions are ideal for protecting VoWiFi communication?(Choose all that apply.)
Response:
What basic RF math formula should be used as a baseline to convert an RF value in units of dBm into a value of mW?
*Note: "dBm" in the formulas represents the known dBm value
When analyzing published competitive tests by equipment vendors, what items are the tests usually lacking?(Choose all that apply.)
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During a post-validation assessment, you have configured a client for 802.1X/EAP but it is not passing authentication. Which areas should you check in the WLAN configuration?
Response:
You are validating association capabilities from clients to an 802.1X/EAP secure SSID. The RADIUS server's IP address is 10.100.50.25 and the
default RADIUS authentication port is used. When testing them, none of the clients are able to associate to the SSID. Troubleshooting the WLAN
infrastructure, you found out that the server is up and the RADIUS service is up as well, but the authenticator is not able to communicate properly
with the server. What's your next troubleshooting step?
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?
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?
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?
Response:
Given: A WLAN controller is connected to ABC Company's core layer 3 Ethernet switch with an IEEE 802.1Q trunk connection. The WLAN
controller's native
VLAN is VLAN 6 and its IP address is 10.0.14.2 /24. Lightweight APs supporting centralized forwarding are connected to the network on VLANs 7,
8, and 9, and they each build a Layer 3 tunnel back to the WLAN controller's IP address.
The dynamically assigned IP addresses received by each AP from a DHCP server will be ________________.
What term refers to the security practice of obfuscating actual data from unintended receivers as the data crosses the transmission medium?
Response:
An associated STA detects a new BSS with the same SSID as the STA's current BSS. The new BSS uses a different IP subnet than the current BSS.
If the STA is configured to use 802.1X/EAP preauthentication, what is likely to occur?
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?
An enterprise customer is subject to the highest standards for network uptime. When designing their wireless network, you should consider which of the following?(Choose all that apply)
Response:
iPerf is a tool used in site surveys and validation surveys for what purpose?
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?
Response:
When performing an active site survey in an existing WLAN infrastructure, in addition to gathering throughput data, what other important function
will you typically be testing at the same time?
When designing for a PTP outdoor link, what important consideration should be made about local vegetation?(Choose all that apply.)
Response:
When selecting a centralized WLAN architecture, what new problem may arise when you change the data forwarding model from centralized to
distributed?
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:
You're preparing to perform a site survey for a company that processes meat. Some areas are restricted due to high-security. What do you have to
do in order to proceed with the site survey?
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?
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 1Gbps. Why is this not sound advice?
What document should be created that provides instructions for install technicians to mount and configure APs?
A table of VLANs in a _________ document should include what device performs ________ services.(Fill in the blanks)
What is the most cost-effective way to accurately measure the height of a ceiling when ladder use is not allowed?
What important item is often left out of operational and maintenance plans?
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What strategy can be used to ensure efficient cell overlap for VoIP site surveys?
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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?
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?
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To increase capacity in a coverage-based wireless network, which of the following techniques are typically recommended?(Choose all that apply.)
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In a PC-based spectrum analyzer, what data chart identifies the overall RF utilization of a specific frequency in the environment being surveyed?
Which definition correctly describes the "local MAC" variation of the centralized WLAN architecture?
For what purposes are VPNs typically used in modern WLANs?(Choose all that apply.)
Response:
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?
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)
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?
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 ________.
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?
For what purpose is SSID hiding generally useful?(Choose all that apply.)
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What are the three biggest WLAN enterprise verticals?(Choose all that apply.)
Response:
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?
When implementing WLAN security according to common best practices, what feature should be enabled when configuring an EAP type?
What service must be implemented on your customers' network to authenticate users against an LDAP database prior to access to the WLAN
infrastructure being granted?
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:
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?
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.)
A high power radio system transmits at 40,000 Watts. What is this power in dBm? Solve this without a calculator.
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What type of standards-based encryption is used by office extension APs for the traffic tunnel?(Choose all that apply.)
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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.)
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What are some advantages of designing guest access with all guest users tunneled directly into the DMZ?
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Four buildings are located in a square orientation to each other. Fisch Stix Food Company is requesting a PtMP link between the buildings. On the building with the root bridge link, what type of antenna is the best choice?
Response:
Which operational plane would be responsible for performing automated RF management?
Response:
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?
What functions do the control plane of centralized and distributed WLAN architectures help solve?(Choose all that apply.)
Response:
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?
Response:
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?
TESTED 29 Apr 2024