When designing a WLAN to support voice in a large office, which design element is of the highest concern for performance?
- A . Frequency Selection
- B . Roaming
- C . AP vendor
- D . Band steering
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?
- A . 320 W
- B . 60 W
- C . 180 W
- D . 240 W
In high-density environments, such as stadiums and convention centers, what extra factor has to be taken into account that can attenuate Wi-Fi signals when these environments are having an event?
- A . Thick walls
- B . I-Beams
- C . People
- D . Fire doors
What document is typically created to launch a project?
- A . Bill of Materials
- B . Project Charter
- C . Work Breakdown Structure
- D . Budget
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?
- A . NDA
- B . SoW
- C . BoM
- D . Hold Harmless
What metric implements the simplest algorithm and lowest accuracy in networks requiring locations?
- A . Angle of Arrival (AoA)
- B . Time of Arrival (ToA)
- C . Time Difference of Arrival (TDoA)
- D . Received Signal Strength Indicator (RSSI)
A
Explanation:
Reference: https://www.ijert.org/research/different-approaches-of-angle-of-arrival-techniques-in-wirelesssensor-networks-IJERTV2IS2346.pdf
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?
- A . EAP-FAST
- B . EAP-TTLS
- C . EAP-TLS
- D . PEAP
C
Explanation:
Reference: https://www.intel.com/content/www/us/en/support/articles/000006999/network-and-i-o/wirelessnetworking.html
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?
- A . Earth bulge
- B . Antenna gain
- C . FSPL
- D . Receive sensitivity
A
Explanation:
Reference: http://www.zytrax.com/tech/wireless/fresnel.htm
You are conducting a physical site survey where heavy machinery is repaired.
What is a common item required specifically for this type of survey?
- A . Personal Protective Equipment (PPE)
- B . Low gain antennas
- C . Low power APs
- D . Indoor APs
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?
- A . The AP in the room is using ZigBee instead of Wi-Fi.
- B . The AP in the room is transmitting on channel 13 and the traveler associated to a non-channel 13 AP located elsewhere.
- C . The switchport that the AP is connected to is only capable of transmitting at 10 Mbps.
- D . The AP in the room is using Bluetooth instead of Wi-Fi.
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?
- A . Lock the AP inside of a metal box
- B . Place the APs in between walls and I-beams
- C . Use an 802.11b AP, so it looks old enough to be in a museum
- D . Use a plastic cover that could blend in with the environment
D
Explanation:
Reference: https://www.webmasterworld.com/webmaster_hardware/4263823.htm
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?
- A . APs are transmitting at a low transmit power
- B . The clients were not upgraded
- C . APs are mounted on the wall
- D . The APs are still using the 5 GHz lower band
You and 10 other people are connected to a public hotspot. 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?
- A . Peer-to-peer blocking
- B . OSPF external routes
- C . Band steering
- D . Load balancing
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?
- A . Because neither of the technologies support data rates over 1Gbps
- B . Because 802.11ax doesn’t support channel bonding
- C . Management overhead that is normal in WLANs will reduce the throughput of the client devices
- D . Because 802.11ac only supports one spatial stream
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?
- A . -70 dBm
- B . -67 dBm
- C . -65 dBm
- D . -63 dBm
You’re about to deploy an Enterprise-class VoWLAN infrastructure. You need to ensure that QoS is properly configured throughout the network.
What Access Category (AC) should voice frames/packets use?
- A . AC_VI
- B . AC_VO
- C . AC_BE
- D . AC_BK
B
Explanation:
Reference: http://support.huawei.com/enterprise/docinforeader!loadDocument1.action? contentId=DOC1000019455&partNo=10022
After importing a floor plan to a predictive design tool, what should be done prior to adding APs, antennas and attenuators (e.g., walls)?
- A . Set the transmit power for all APs
- B . Add pictures of the environment
- C . Nothing; just begin by adding APs, antenna and attenuators
- D . Calibrate the floor plan to increase accuracy
Your customer’s 802.11n laptops are not able to see the SSID in the 5 GHz band in the conference room. When doing a walkthrough using one of these laptops, you confirm that it is unable to see the SSID in the 5 GHz band in the conference room. When using your own 802.11 ac laptop, you’re able to see the SSID.
What is the most likely cause of this problem?
- A . The AP is configured to use channel 36
- B . The customer laptop does not support Transmit Beamforming
- C . The AP is on channel 144
- D . Their laptops are SISO clients
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?
- A . 36-40
- B . 44-48
- C . 116-124
- D . 1-11
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?
- A . Patch
- B . Dish
- C . Grid
- D . Low-gain dipole
When using a predictive design tool, you have selected APs with an antenna gain 3 dBi and set the transmit power of the predicted APs to 25 mW.
What should be EIRP of the APs in the design?
- A . 11 dBm
- B . 6.25 mW
- C . 125 mW
- D . 17 dBm
Switches and APs have already been chosen by your customer. All switches support 802.3bz MultiGig interfaces and APs are 4×4:4 802.11ac 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?
- A . Cat-5
- B . Cat-6
- C . Cat-5e
- D . Cat-6a
When surveying an existing WLAN infrastructure for a possible redesign, you use two Wi-Fi USB adapters to collect RSSI data and two USB spectrum analysis adapters to collect RF spectrum data. Since your laptop doesn’t have enough USB ports, you use a 4-port powered USB 3.0 hub.
What issues could be caused by the use of USB 3.0 that will impact your site survey?
- A . It does not give you enough bandwidth to collect data coming from all of the adapters.
- B . It does not give you enough power for all four of your adapters.
- C . It generates noise in the 2.4 GHz band, giving you a false perception of the noise floor.
- D . It generates noise in the 5 GHz band, giving you a false perception of the noise floor.
C
Explanation:
Reference: https://support.ekahau.com/hc/en-us/articles/235437007-USB-3-0-Causing-High-Noise-Floorand-Its-Impact-on-Site-Surveys
What is the most cost-effective way to accurately measure the height of a ceiling when ladder use is not allowed?
- A . Estimate the height based on known object sizes
- B . Gather measurements from other objects and do the math
- C . Rent a lift-cart to lift you up to the ceiling
- D . Use a laser measure to measure the distance from the floor to the ceiling