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Fragen in diesem Quiz (90)
1When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs respond?
- AFor each probe request frame, only one AP may reply with a probe response.
- BEach AP responds in turn after preparing a probe response and winning contention.
- CEach AP checks with the DHCP server to see if it can respond and then acts accordingly.
- DAfter waiting a SIFS, all APs reply at the same time with a probe response.
2What statement about 802.3. Clause 33 Power over Ethernet is true?
- AOnly midspan PSEs are supported.
- BThe lowest voltage drop is achieved when using CAT6 cable instead of CAT5 or CAT5e.
- COnly endpoint PSEs are supported.
- DWhen using CAT5 cabling, you increase the maximum draw available to the PD over that available with CAT6.
3You are deploying a WLAN with the access points configured for 10 mW of output power on the 2.4 GHz radios and 20 mW of output power on the 5 GHz radios. Some semi-directional antennas are also in use. What kind of deployment is described?
- AHigh density
- BSOHO
- CStandard office
- DResidential
4When a client moves to a new BSS within an ESS, what step is a part of the 802.11 reassociation process?
- AThe client station transmits a Reassociation Request frame to its current access point.
- BThe current access point informs the IP gateway of the reassociation.
- CThe current access point triggers the client's reassociation service.
- DThe new access point transmits a Reassociation Response to the client station with a status value.
5What statement about the SSID is true?
- AThe SSID is a security session identifier used in RSNs.
- BThe SSID must be included in an association request frame.
- CThe SSID is an alphanumeric value assigned to device manufacturers by the IEEE.
- DThe SSID is a pseudo-random number assigned to each client by an AP.
6Users and Network support personnel at a mid-sized equipment manufacturer have been discussing the potential uses and benefits of implementing an indoor WLAN. The network administrator and network manager have requested a meeting of senior management personnel to discuss a WLAN implementation before performing a site survey or taking any implementation steps. The first topic of discussion in the meeting is the corporate policy concerning implementation and use of WLAN technology. What specific topics are appropriate in this policy meeting? (Choose 2)
- AUse of the latest 802.11ac equipment
- BBusiness justification
- CUser productivity impact
- DAntenna types
- EDefining RF channels for use
7Your consulting firm has recently been hired to complete a site survey for a company. Your engineers use predictive modeling software for surveying, but the company insists on a pre-deployment site visit. What task should be performed as part of the pre-deployment visit to prepare for a predictive survey?
- AEvaluate the building materials at ABC's facility and confirm that the floor plan documents are consistent with the actual building.
- BTest several antenna types connected to the intended APs for use in the eventual deployment.
- CCollect information about the company's security requirements and the current configuration of their RADIUS and user database servers.
- DInstall at least one AP on each side of the exterior walls to test for co-channel interference through these walls.
8What 802.11 network configuration would result in multiple stations broadcasting Beacon frames with the same BSSID but with different source addresses?
- AA single AP supports multiple BSSs with different SSIDs.
- BAn SCA network is in use.
- CMultiple Aps have been loaded with the same configuration from an image file.
- DAn IBSS is used instead of a BSS.
9What best describes WPA2 in relation to 802.11 wireless network?
- AWPA2 is specified in the 802. 11 standard as implementing CCMP/AES.
- BWPA2 is the standard that defines security for WLANs.
- CWPA2 is a certification created by the Wi-Fi Alliance that validates device correctly implement CCMP/AES.
- DWPA2 is the second version of WPA and it enhances security through the use of TKIP Instead of WEP.
10What is the most effective method for testing roaming in relation to 802.11 VoIP handsets?
- AUse the built-in roaming monitor built into all VoIP handsets
- BUse a protocol analyzer to capture the traffic generated when a laptop roams
- CPlace a call with the handset and move around the facility to test quality during roaming
- DUse a spectrum analyzer to monitor RF activity during a VoIP call
11What statement accurately describes the RF cables and connectors that are used in an 802.11 WLAN system?
- A75 and 125 ohms are the typical impedances .11 WLAN connectors.
- BTwo RF connectors of the same type (e.g. SMA), manufactured by different companies, may vary in specifications.
- CSome RF connectors do not cause insertion loss.
- DLarge diameter RF cables cause greater loss than small diameter cables.
12You are implementing a VHT-capable AP. Which one of the following channels is available in the 802.11-2016 standard, which was not available before the ratification .11ac?
- A153
- B161
- C144
- D56
13What answer correctly completes the following sentence?
"_______ and physical carrier sense functions are used to determine if the wireless medium is busy."- ABackup
- BPassive
- CVirtual
- DActive
14What statement describes the authorization component of a AAA Implementation?
- AValidating client device credentials against a database.
- BImplementing a WIPS as a full-time monitoring solution to enforce policies.
- CGranting access to specific network services or resources according to a user profile.
- DVerifying that a user is who he says he is.
15You were previously onsite at XYZ's facility to conduct a pre-deployment RF site survey. The WLAN has been deployed according to your recommendations and you are onsite again to perform a post-deployment validation survey. When performing this type of post-deployment RF site survey for voice over Wi-Fi. what is an action that must be performed?
- ASpectrum analysis to locate and identity RF Interference sources.
- BFrequency-band hopping analysis to detect improper RF channel implementations.
- CProtocol analysis to discover channel use on neighboring APs.
- DApplication analysis with an active phone call on a VoWiFi handset.
16When an ACK frame is not received by the transmitting STA, what is assumed?
- AThe frame was correctly delivered
- BThe frame was not delivered and must be retransmitted
- CThe receiver is offline
- DThe receiver processed the frame, but did not respond with an ACK frame because 802.11w is enabled
17ABC Company has thousands of Wi-Fi users accessing their network on a daily basis. Their WLAN consists access points, 6 WLAN controllers, and a wireless network management system. What network functions are performed by the enterprise-class WNMS?
- ARadio management, fast roaming, key caching, and other centralized control plane operations
- BCentralized bridging of guest data traffic and application of firewall and QoS policies to data
- CManagement of WLAN controller configuration and provisioning of firmware updates
- DGenerating, encrypting, and decrypting 802.11 frames and collecting RF radio data
18What is primary metric of scanning can stations use to select the best AP for connectivity to the desired BSS?
- ASignal strength of access point beacons received
- BPING latency when testing against an internet server
- CFCS errors in frames transmitted to and from the AP
- DThroughput speed in Mbps
19Which directional antenna types are commonly used by indoor Wi-Fi devices in a MIMO multiple spatial stream implementation?
- ADish and grid
- BDipole and yagi
- CGrid and sector
- DPatch and panel
20What advantages does using predictive site survey modeling software offer over performing a manual site survey? (Choose 2)
- APredictive modeling software can predict the ideal access point location 100% of the time, whereas the results from manual surveying are less reliable.
- BPredictive modeling software makes it simple to assess multiple different AP locations and then adjust and display the AP's expected coverage pattern in almost real-time.
- CPredictive modeling software provides more reliable data than manual surveys when fine-tuning and validating access point placement after the installation.
- DThe exact impact of interference sources from external networks can be more accurately measured when using predictive modeling software than with manual surveys.
- EIt takes less time to create an initial site survey for a large facility when using predictive modeling software than when performing a manual survey.
21In an 802.11n 2.4 GHz BSS, what prevents each station from using the full network bandwidth (e.g. 130 Mbps) for user data throughput when multiple clients are actively exchanging data with the AP?
- ARadio receiver hardware cannot process data as quickly as it can be transmitted.
- BHalf of the bandwidth is allocated to uplink traffic and half to downlink traffic.
- CWLAN devices cannot detect collisions and must receive positive frame acknowledgment.
- DAPs do not have sufficient wired connection speeds to the LAN, even at 1 Gbps connections with 802.11n and earlier APs.
22You are performing a post implementation validation survey. What basic tool can be used to easily locate areas of high co-channel interference?
- AThroughput tester
- BAccess point spectrum analyzer
- CLaptop-based spectrum analyzer
- DWi-Fi scanner
23In addition to coverage analysis results, what should be included in a post-deployment site survey report to ensure WLAN users experience acceptable performance?
- ALayer 4 protocol availability analysis results
- BApplication Layer protocol availability analysis results
- CCapacity analysis results
- DWAN interface analysts results
24In a long-distance RF link, what statement about Fade Margin is true?
- AFade Margin is an additional pad of signal strength designed into the RF system to compensate for unpredictable signal fading.
- BThe Fade Margin of a long-distance radio link should be equivalent to the receiver's antenna gain.
- CA Fade Margin is unnecessary on a long-distance RF link if more than 80% of the first Fresnelzone is clear of obstructions.
- DThe Fade Margin is a measurement of signal loss through free space, and is a function of frequency and distance.
25Your 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?
- AAP-based spectrum analysis
- BLaptop based spectrum analyzers
- COverlay WLAN monitoring solution
- DLaptop-based protocol analyzers
26You 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?
- AInstall iPerf
- BInstall WinPCAP
- CCalibrate the floor plan
- DNothing, you can simply start capturing signal readings
27What is a channel mode specified by the 802.11n (High Throughput) PHY?
- AFrequency Hopping
- B20/40 MHz
- C22 MHz
- D80 MHz
28Lynne runs a small hotel, and as a value added service for her customers she has implemented a Wi-Fi hotspot. Lynne has read news articles about how hackers wait at hot-spots trying to take advantage of unsuspecting users. She wants to avoid this problem at her hotel. What is an efficient and practical step that Lynne can take to decrease the likelihood of active attacks on her customers' wireless computers?
- AImplement Network Access Control (NAC) and require antivirus and firewall software along with OS patches.
- BRequire EAP-FAST authentication and provide customers with a username/password on their receipt.
- CImplement an SSL VPN in the WLAN controller that initiates after HTTPS login.
- DEnable station-to-station traffic blocking by the access points in the hotel.
29What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?
- AOFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.
- BOFDM was first introduced in 802. 11a and is used by the ERP, HT and VHT PHYs as well.
- COFDM implements BPSK modulation to allow for data rates up to 7 Gbps.
- DOFDM modulation is used only in 5 GHz 802. 11 transmissions.
30What terms accurately complete the following sentence?
The IEEE 802.11-2012 standard specifies mandatory support of the cipher suite for Robust Security Network Associations, and optional use of the cipher suite, which is designed for use with pre-RSNA hardware.- ACCMP, TKIP
- B802.1X/EAP, WEP
- CTLS, SSL
- DRC5, RC4
31What factors will have the most significant impact on the amount of wireless bandwidth available to each station within a BSS?
- AThe number of client stations associated to the BSS
- BThe power management settings in the access point's beacons
- CThe presence of co-located (10m away) access points on non-overlapping channels
- DThe layer 3 protocol used by each station to transmit data over the wireless link
32What statements about the beamwidth of an RF antenna are true?
- AHorizontal and vertical beamwidth are calculated at the points in which the main lobe decreases power by 3 dB.
- BVertical beamwidth is displayed (in degree) on the antenna's Azimuth chart.
- CWhen antenna gain is lower, the beamwidth is also lower in both the horizontal and vertical dimensions.
- DThe beamwidth patterns on an antenna polar chart indicate the point at which the RF signal stops propagating.
33To ease user complexity, your company has implemented a single SSID for all employees. However, the network administrator needs a way to control the network resources that can be accessed by each employee based on their department. What WLAN feature would allow the network administrator to accomplish this task?
- ASNMP
- BVRRP
- CRBAC
- DIPSec
- EWIPS
- FWPA2
34What cause of hidden nodes within a BSS would be more likely lead to an increase in collisions and retries?
- AData frames too large for the physical environment
- BClient stations broadcasting with too much power
- CAccess pointsbroadcasting with too little power
- DLarge 802.11 cells with physically distributed stations
35During a post-implementation survey, you have detected a non-802.11 wireless device transmitting in the area used by handheld 802.11g scanners. What is the most important factor in determining the impact of this non802.11 device?
- AProtocols utilized
- BChannel occupied
- CReceive sensitivity
- DAirtime utilization
36Option 43 must be configured to allow access points to locate controller. In what network service should this option be configured?
- ADHCP
- BLDAP
- CDNS
- DRADIUS
37A WLAN is implemented using wireless controllers. The Aps must locate the controllers when powered on and connected to the network. Which one of the following methods is commonly used to locate the controllers by the Aps?
- ADHCP
- BGRE
- CNTP
- DSNMP
38An IEEE 802.11 amendment is in the draft state. What impact does this draft amendment have on the 802.11 standard?
- ANo impact: Until an amendment is ratified, it does not become part of the standard.
- BDevices will be released based on the draft amendment and the draft amendment features are part of the standard.
- CThe standard is changed to reflect the new capabilities as soon as amendment enters the draft stage.
- DNo impact: Draft amendments do not become part of the standard until a working group is formed.
39When implementing PoE, what role is played by a switch?
- APO
- BPSE
- CMidspan injector
- DPower splitter
40What security solution is deprecated in the 802.11 standard and should never be used in any modern WLAN deployment?
- AAES
- BShared Key Authentication
- CCCMP
- DOpen System Authentication
41You are reconfiguring an AP to use the short guard Interval. How long will the new guard interval duration be after the change?
- A400 ns
- B10 ms
- C800 ns
- D104 ms
42You 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?
- AIxChariot
- BPython
- CPuTTy
- DiPerf
43What statement about the IEEE 802.11e QoS facility is true?
- A802.11 QoS is achieved by giving high priority queues a statistical advantage at winning contention.
- BFour 802.1p user priorities are mapped to eight 802.11 transmit queues.
- CWhen the Voice queue has frames awaiting transmission, no data will be transmitted from the Best Effort queue.
- D802.11 control frames are assigned to the 802.11 EF priority queue.
44You manage a WLAN with 100 802.1lac access points. All access points are configured to use 80 MHz channels. In a particular BSS, only 40 MHz communications are seen. What is the likely cause of this behavior?
- AThe short guard interval is also enabled
- BThe clients are all 802.11n STAs or lower
- CThe AP is improperly configured to use only 40 MHz of the 80 MHz allocated bandwidth
- DAll clients implement single spatial stream radios
45Which one of the following frequency ranges is not specified for use by IEEE 802.11 radios as .11-2012?
- A600-630 MHz
- B2.4000-2.4835 MHz
- C5.725-5.874 GHz
- D5.15-5.25 GHz
46You are managing a wireless access point in autonomous mode using the Web based interface. You capture traffic during this management task and notice that you can see the HTML code of the Web pages used for access point management. What error in administration could be the cause of this security concern?
- AA VPN with the AP is not established
- BWPA2 is disabled on the WLAN
- CHTTP is in use instead of HTTPS
- DIPSec is not in use for the management connection as recommended
47You are selecting antennas for a WLAN operating in the 5 GHz frequency band. What specifications should be evaluated for an antenna before it is implemented in this WLAN system?
- A802.11ad compatibility
- BTPC support
- CImpedance in Ohms
- DReturn Loss Rating
48What standard is referenced into the 802.11-2012 specification and is recommend for robust WLAN client security?
- ASSID hiding
- BWEP
- C802.1X/EAP
- DIPSec VPN
49You have been tasked with creating a wireless link between two buildings on a single campus. The link must support at least 150 Mbps data rates. What kind of WLAN technology role should you deploy?
- AIBSS
- BWPAN
- CAccess BSS
- DWireless bridging
50A client complains of low data rates on his computer. When you evaluate the situation, you see that the signal strength is -84 dBm and the noise Moor is -96 dBm. The client is an 802.11ac client and connects to an 802.11ac AP. Both the client and AP are 2x2:2 devices. What is the likely cause of the low data rate issue?
- AWeak signal strength
- BToo few spatial streams
- CLack of support for 802.11n
- DCAT5e cabling run to the AP
51The IEEE 802.11-2012 standard requires VHT capable devices to be backward compatible with devices using which other 802.11 physical layer specification (PHY)?
- AOFDM
- BHR/DSSS
- CERP-PBCC
- DDSSS
52What ID is typically mapped to an AP's MAC address if a single BSS is implemented?
- AVLAN ID
- BBSSID
- CDevice ID
- DSSID
53The network administrator at XYZ Company recently attended a training class on wireless security and realized that he should update the corporate security policy to address WLAN technology. The network administrator is listing the items that should be addressed in the security policy update, and has asked for your input. What WLAN topics should be addressed by a company security policy? (Choose 3)
- ATheft prevention and data security of WLAN infrastructure devices
- BWireless intrusion monitoring and response procedures
- CWLAN performance analysis baseline documentation
- DWired network performance analysis and baseline documentation
- ETraining of the IT staff on WLAN operational security
- FUser density planning and AP client association thresholds
54You are onsite with a client to perform a post-deployment site survey. When verifying a multiple channel VoWiFi deployment using a VoWiFi handset, which aspect is most important?
- APerforming protocol analysis with a single wireless adapter that is scanning all channels in use.
- BTesting a constant conversation orhandset tone while roaming from area to area, or performing an active survey.
- CConfiguring DSCP-to-802.11e QoS maps on the handset for each access category.
- DVerifying the VHT functionality to handle the call volume incurred by a single VoIP phone call.
55In an 802.11 2.4 GHz system, what 22 MHz channels are considered non-overlapping?
- A4 and 6
- B7 and 11
- C1 and 5
- D2 and 8
56You 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 sec the activity that it is generating. What common spectrum analyzer view should you use for this analysis?
- AWaterfall/Spectrogram
- BReal-Time FFT
- CAPs
- DClients
57You are the network administrator for ABC Company. Your manager has recently attended a wireless security seminar. The seminar speaker taught that a wireless network could be hidden from potential intruders if you disabled the broadcasting of the SSID in Beacons and configured the access points not to respond to Probe Request frames that have a null SSID field.
Your manager suggests implementing these security practices. What response should you give to this suggestion?- AAny tenants in the same building using advanced penetration testing tools will be able to obtain the SSID by exploiting WPA EAPOL-Key exchanges. This poses an additional risk of exposing the WPA key.
- BAny 802.11 protocol analyzer can see the SSID in clear text in frames other than Beacons frames. This negates any security benefit of trying to hide the SSID in Beacons and Probe Response frames.
- CTo improve security by hiding the SSID, the AP and client stations must both be configured to remove the SSID from association request and response frames. Most WLAN products support this.
- DThis security practice prevents manufacturers' client utilities from detecting the SSID. As a result, the SSID cannot be obtained by attackers, except through social engineering, guessing, or use of a WIPS.
58What wireless networking term describe the increase of RF energy in an intentional direction with the use of an antenna?
- ADirected Radiation
- BActive Amplification
- CPassive Gain
- DBeam Digression
59Which one of the following is not a factor considered when calculating the Link Budget for an outdoor point-topoint WLAN bridge link?
- AMU-MIMO capabilities of the bridges
- BReceive antenna gain
- CTransmit power
- DOperating Frequency
60A dual-band 802-1 lac AP must be powered by PoE. As a class 4 device, what power level should be received at the AP?
- A30 W
- B25.5 W
- C15.4 W
- D12.95 W
61In WLAN security, which authentication method always create Layer 2 dynamic encryption keys?
- AHTTPS Captive Portal
- BWEP
- CEAP-TLS
- DShared Key
62You 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?
- ABand Steering
- BFT
- COKC
- DLoad balancing
63You have received a report of poor wireless connections on the third floor of a building under your administration. Three individuals have reported the problem. Apparently, the connections are reporting a strong signal, but the users cannot access the Internet. With the problem identified, what is the next logical step in the troubleshooting process?
- APerform corrective actions
- BDiscover the scale of the problem
- CCreate a plan of action or escalate the problem
- DVerify the solution
64Which one of the following channels can be used for VHT transmissions?
- A11
- B6
- C48
- D1
65What parameter of the client driver should be configured on a Windows computer to optimize moving from one AP to another within the ESS?
- ABand preference
- BRoaming threshold
- CESSID selection
- DSSID selection
66Two co-located 802.11b/g/n APs can interfere with one another and cause contention and collisions, even when the two APs are operating on non-overlapping channels (e.g. 1 & 6). What deployment flaw could cause this problem?
- AThe access points are mounted too closely to one another.
- BReflective objects in the area are causing significant multipath.
- CA client station is using active scanning to probe for access points on multiple channels.
- DThe access points are not synchronized to the same NTP server.
67What can an impedance mismatch In the RF cables and connectors cause?
- AFewer MCS values In the MCS table
- BExcessive VSWR
- CIncreased amplitude of the RF signal
- DIncreased range of the RF signal
68What feature was introduced in the 802.11h amendment in order to uphold regulatory requirements for 5 GHz operations?
- A256-QAM
- BDistributed Coordination Function (DCF)
- CTransmit Power Control (TPC)
- DRadio Resource Management (RRM)
69A 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?
- AAccess point spectrum analyzer
- BLaptop-based spectrum analyzer with an omni-directional antenna
- CLaptop-based spectrum analyzer with a directional antenna
- DLaptop-based protocol analyzer with an omni-directional antenna
70ABC 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 as the 802.1X Authenticator?
- AAll non-root bridges
- BThe root bridge
- CThe Ethernet switch
- DThe RADIUS server
71The requirement 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 ta likely used that demands these requirements?
- AE-mail
- BRTLS
- CVoIP
- DFTP
72The center frequency of channel 1 in the 2.4 GHz band is 2.412 GHz (2412 MHz). What is the center frequency of channel 4?
- A2.413 GHz
- B2.417 GHz
- C2.422 GHz
- D2.427 GHz
73Which IEEE 802.11 physical layer (PHY) specifications include support for and compatibility with both ERP and HR/DSSS?
- AVHT (802.11ac)
- BOFDM (802.11a)
- CDSSS (802.11-Prime)
- DHT (802.11n)
74You are troubleshooting a client issue on a Windows laptop. The laptop can see and connect to 2.4 GHz APs, but it does not even see 5 GHz APs. While evaluating the issue, you determine that this problem is happening for all of the laptops of this model in the organization. Several other tablets connect on channel 48 and channel 52 in the same work areas. What is the likely problem?
- AThe clients are configured to use WPA and 5 GHz channels only support WPA2
- BThe antennas in the laptops have insufficient gain to detect the 5 GHz signals
- CThe access points are configured to disallow 5 GHz
- DThe client drivers are faulty and should be upgraded
75An 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?
- AWPAN
- BAd-hoc
- CBSS
- DIBSS
76You are troubleshooting a client problem with a 2.4 GHz WLAN connection. The client is experiencing surprisingly low data rates during the work day. You analyze the workspace outside of business hours and detect a strong signal with a typical noise floor at the client location. During working hours, the user works with a laptop in the area and uses an external USB hard drive for continuous data access. The user also states that the laptop works as expected on her home network. The user working approximately 8 feet away from this client experiences no problems. Based on this information, what is the likely cause of the problem?
- AThe laptop has a falling wireless adapter
- BThe AP is overloaded during the work day
- CThe external hard drive is USB 3.0 and is causing a significant increase in the noise floor when in us
- DThe drivers in the laptop are corrupt
77A company has hired you to perform a pre-deployment site survey of their facility. During an interview, the network manager informs you that the new wireless network must use 5 GHz bands and OFDM, and VoWiFi handsets will be used extensively over the wireless network.
What items do you need to include in the RF site survey report? (Choose 2)- AA heat map demonstrating signal quality in areas where VoWiFi is supported.
- BCodec types and sampling rates for each VoWiFi phone.
- CSecurity parameters and configuration steps for VoWiFi handsets.
- DTest results from an active survey with a VoWiFi handset.
- EResults of OFDM versus ERP performance in each BSA.
78What item is essential for performing a manual RF site survey for a warehouse facility?
- AA facility map with an of applications used in each area
- BI-Beam mounting kits for hanging temporary access points
- CLow-gain omni antennas for APsmounted high on warehouse ceilings
- DPredictive site survey software that supports highly directional antennas
79What factors does not influence the distance at which an RF signal can be effectively received?
- AFree Space Path Loss
- BReceiving station's radio sensitivity
- CTransmitting station's output power
- DReceiving station's output power
80An RF signal sometimes bends as it passes through some material other than free space. What is the term that describe this behavior?
- AReflection
- BRefraction
- CScattering
- DWarping
81To ease user complexity, your company has implemented a single SSID for all employees. However, the network administrator needs a way to control the network resources that can be accessed by each employee based on their department. What WLAN feature would allow the network administrator to accomplish this task?
- ARBAC
- BSNMP
- CWIPS
- DWPA2
82As you prepare for a site survey in a multi-floor corporate office, you have learned about several wireless devices that support connection-oriented, real-time applications. These applications are sensitive to service interruptions and require excellent signal quality, low latency, and low loss. For that reason, it is important to identify sources of RF interference as well as building characteristics that would cause RF blockage or dead spots. What systems or environmental characteristics are most likely to cause interference or RF blockage and disrupt service for these applications? (Choose 2)
- AMicrowave ovens
- BNarrow hallways
- CElevator shafts
- DRFID chokepoints
- EWorkspace dividers
83You are being interviewed by ABC Company for employment as a wireless site survey expert. The interviewing manager asks you what items should be included in a site survey report generated as part of a manual site survey process. What answer would be accurate?
- AItemized list of equipment, licenses, and support contracts required for the facility
- BRF heat map illustrating coverage and signal quality for each frequency band
- CDocumentation proving proper entry of wall material types into the site survey software
- DDocumentation noting how each WLAN user group will authenticate to the network
84What is appended to the end of each 802.11 data frame after the payload?
- AFCS
- BPreamble
- CMAC header
- DPHY header
85What cipher suite is specified by the 802.11-2016 standard and is not deprecated?
- ATemporal Key Integrity Protocol
- BExtensible Authentication Protocol
- CCounter Mode with CBC-MAC Protocol
- DWired Equivalent Privacy
86You are using a tool that allows you to see signal strength for all APs in the area with a visual representation. It shows you SSIDs available and the security settings for each SSID. It allows you to filter by frequency band to see only 2.4 GHz networks or only 5 GHz networks. No additional features are available. What kind of application is described?
- ASite survey utility
- BProtocol analyzer
- CSpectrum analyzer
- DWLAN discovery tool
87When compared with legacy Power Save mode, how does VHT TXOP power save improve battery life for devices on a WLAN?
- AVHT TXOP power save allows stations to enter sleep mode and legacy Power Save does not.
- BVHT TXOP power save uses the partial AID in the preamble to allow clients to identify frames targeted for them.
- CLegacy Power Save mode was removed in the 802.11ac amendment.
- DVHT TXOP power save allows the WLAN transceiver to disable more components when in a low powerstate.
88A 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 9 dBi gain, what is the EIRP at the antenna element?
- A23 dBm
- B26 dBm
- C13 dBm
- D10 dBm
89What is the final step in an effective troubleshooting process?
- ADocument the results
- BDisable the WLAN
- CNotify the users of problem resolution
- DVerify the solution
90What factor is likely to cause the least impact on the application layer throughput of an 802.11n client station in a 2.4 GHz HT BSS?
- AIncreasing or decreasing the number of spatial streams in use by the client station and AP
- BImplementation of several other clients in the same BSS using 802.11g radios
- CImplementation Fast BSS Transition (FT) for roaming
- DRF interference from more than 10 nearby Bluetooth transmitters
Informationen
- Beschreibung
- 90 questions
- Autor
- Jen Kim
- Sprache
- English
- Aufrufe
- 9
- Schlagwörter
- Bewertung
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