EMT Practice Test

1. Question Content...

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Question1: You must plan for POE in an office environment. Which one of these devices is least likely to be a POE PSE?

Question2: What security option for 802.11 networks supports SAE and requires protected management frames?
* WPA

Question3: A WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB loss. If the cable is connected to an antenna with 9dBi gain, what is the EIRP at the antenna element?

Question4: Which unit of measurement, as formally defined, is an absolute unit that is used to quantify received signal power levels on a logarithmic scale?

Question5: When considering data rates available in HT and VHT PHY devices, in addition to the modulation, coding, channel width, and spatial streams, what impacts the data rate according to the MCS tables?

Question6: What 802.11 PHY uses available space in very low frequency ranges that is not in use at the time by broadcast video signals?

Question7: What security solution is required to be used in place of Open System Authentication for all open network
802.11 implementations in the 6 GHz band?

Question8: When an ACK frame is not received by the transmitting STA, what is assumed?

Question9: Option 43 must be configured to allow access points to locate controllers. In what network service should this option be configured?

Question10: What ID is typically mapped to an AP's MAC address if a single BSS is implemented?

Question11: What 802.11 network configuration would result in multiple stations broadcasting Beacon frames with the same BSSID but with different source addresses?

Question12: A POE device requires 47 W of power. What POE specification should be used?

Question13: You are tasked with performing a throughput test on the WLAN. The manager asks that you use open source tools to reduce costs. What open source tool is designed to perform a throughput test?

Question14: You are deploying a WLAN monitoring solution that utilizes distributed sensor devices. Where should sensors be deployed for best results? Choose the single best answer.

Question15: What feature of 802.1 lax (HE) may impact design decisions related to AP placement and the spacing between same-channel BSS cells (3SAs) because it is designed to reduce overlapping BSS contention?

Question16: You are troubleshooting a problem with interference from a non-802.11 device. Given that the device is not a WLAN device, you cannot use a protocol analyzer and have chosen to use a spectrum analyzer. You want to view the signal from the interfering device over time to see the activity that is generating.
What common spectrum analyzer view should you use for this analysis?

Question17: What best describes WPA2 in relation to 802.11 wireless networks?

Question18: What common feature of MDM solutions can be used to protect enterprise data on mobile devices?

Question19: Your manager asked you to locate a solution that allows for centralized monitoring of WLAN performance over time. He wants a single pane of glass for administration and monitoring of the solution. What do you recommend?

Question20: When implementing PoE, what role is played by a switch?

Question21: You are performing a post-implementation validation survey. What basic tool can be used to easily locate areas of high co-channel interference?

Question22: 802. 11ax (HE) introduces Resource Units that can be used to allow communications with multiple devices at the same time, on the same channel, in the same BSS. What feature of 802.1 lax provides this functionality?

Question23: 802. 11ax (HE) introduces Resource Units that can be used to allow communications with multiple devices at the same time, on the same channel, in the same BSS. What feature of 802.1 lax provides this functionality?

Question24: You are installing an AP to be used by 27 laptops. All laptops will connect on the 5 GHz frequency band. A neighbor network uses channels 1 and 6. What channel should be used for this AP and why?

Question25: You are implementing a VHT-capable AP. Which one of the following channels is available in the
802.11-2016 standard that was not available before the ratification of 802.11 ac?

Question26: In which plane of the three networking planes is an access point configured by a WLAN controller?

Question27: What is appended to the end of each 802.11 data frame after the payload?

Question28: What is an advantage of using WPA3-Personal instead of WPA2-Personal as a security solution for 802.11 networks?

Question29: A dual-band 802.11ac AP must be powered by PoE. As a class 4 device, what power level should be received at the AP?

Question30: What factor does not influence the distance at which an RF signal can be effectively received?

Question31: You are a small business wireless network consultant and provide WLAN services for various companies. You receive a call from one of your customers stating that their laptop computers suddenly started experiencing much slower data transfers while connected to the WLAN. This company is located in a multi-tenant office building and the WLAN was designed to support laptops, tablets and mobile phones. What could cause a sudden change in performance for the laptop computers?

Question32: In a long-distance RF link, what statement about Fade Margin is true?

Question33: You are using a site survey tool for post-implementation validation. You have installed the appropriate adapter driver and imported a floor plan. Now, you want to take the next step in proper tool use. What must you do before gathering survey data after the floor plan is imported?

Question34: Which directional antenna types are commonly used by indoor Wi-Fi devices in a MIMO multiple spatial stream implementation?

Question35: When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs respond?

Question36: A non-802.11 device is suspected of causing interference on the WLAN. You are not certain of the location or type of device. What is the best solution for locating this non-802.11 device?

Question37: The requirements for a WLAN you are installing state that it must support unidirectional delays of less than
150 ms and the signal strength at all receivers can be no lower than -67 dBm. What application is likely used that demands these requirements?

Question38: The BSA of an AP covers the area used by the sales and marketing department. Thirty-five stations operate in this space. The users indicate that they need more throughput and all stations are 5 GHz capable 802.11ac clients. The current AP configuration uses 20 MHz channels in both 2.4 GHz and 5 GHz. What is the least expensive solution available for increasing throughput for these users without implementing configuration options that are not recommended?

Question39: What security solution is deprecated in the 802.11 standard and should never be used in any modern WLAN deployment?

Question40: In a mesh BSS (MBSS), according to the 802.11 standard, what device connect the mesh to an Ethernet network?

Question41: What statement about the beamwidth of an RF antenna is true?

Question42: ABC Company is planning a point-to-multipoint outdoor bridge deployment with standalone (autonomous)
802.11 bridge units. 802.1X/EAP will be used for bridge authentication. A Linux-based RADIUS server will be used for authentication. What device in the bridge implementation acts as the 802.1X Authenticator?

Question43: An 802.11 WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB of loss. The cable is connected to an antenna with 16 dBi of gain. What is the power level at the Intentional Radiator?

Question44: As an RF wave propagates through space, the wave front experiences natural expansion that reduces its signal strength in an area. What describes the rate at which this expansion happens?

Question45: What is the final step in an effective troubleshooting process?

Question46: An IEEE 802.11 amendment is in the daft state. What impact does this draft amendment have on the 802.11 standard?

Question47: You are implementing a multi-AP WLAN and fast secure roaming is essential. Which one of the following methods is an IEEE 802.11 standard method for fast roaming?

Question48: In an 802.11 2.4 GHz system, what 22 MHz channels are considered non-overlapping?

Question49: An RF signal sometimes bends as it passes through some material other than free space. What is the term that describes this behavior?

Question50: An 802.11-based network uses an AP and has several connecting clients. The clients include iPhones, iPads, laptops and one desktop. What WLAN use case is represented?

Question51: You are attempting to locate the cause of a performance problem in two WLAN cells in a mostly overlapping coverage area. You note that one AP is on channel 1 and the other is on channel 2. When you document your findings, what term do you use to describe the problem in this configuration?

Question52: Which IEEE 802.11 physical layer (PHY) specification includes support for and compatibility with both ERP and HR/DSSS?