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NEW QUESTION 12
A string of characters and digits is entered into an AP and a client STA for WPA2 security. The string is 8 characters long. What is this string called?
- A. WEP key
- B. PSK
- C. MSK
- D. Passphrase
Answer: B
NEW QUESTION 13
You 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?
- A. Application analysis with an active phone call on a VoWiFi handset
- B. Protocol analysis to discover channel use on neighboring APs
- C. Spectrum analysis to locate and identity RF Interference sources
- D. Frequency-band hopping analysis to detect improper RF channel implementations
Answer: C
NEW QUESTION 14
What factor does not influence the distance at which an RF signal can be effectively received?
- A. Receiving station's output power
- B. Free Space Path Loss
- C. Transmitting station's output power
- D. Receiving station's radio sensitivity
Answer: D
NEW QUESTION 15
Return Loss is the decrease of forward energy in a system when some of the power is being reflected back toward the transmitter.
What will cause high return loss in an RF transmission system, including the radio, cables, connectors and antenna?
- A. High output power at the transmitter and use of a low-gain antenna
- B. A Voltage Standing Wave Ratio (VSWR) of 1:1
- C. The use of cables longer than one meter in the RF system
- D. An impedance mismatch between components in the RF system
Answer: D
NEW QUESTION 16
You are evaluating a connection that states the data rate is 150 Mbps. What is the expected throughput of this connection?
- A. More than 150 Mbps because of compression
- B. 54 Mbps because that is the actual maximum throughput of an 802.11 connection
- C. 150 Mbps because the data rate is equal to the throughput
- D. Less than 150 Mbps because of 802.11 overhead and contention
Answer: D
NEW QUESTION 17
You are troubleshooting a client issue on a Windows laptop. The laptop can see and connect to 2.4 GHz APs, but is 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?
- A. The access points are configured to disallow 5 GHz.
- B. The clients are configured to use WPA and 5 GHz channels only support WPA2.
- C. The antennas in the laptop have insufficient gain to detect the 5 GHz signals.
- D. The client drivers are faulty and should be upgraded.
Answer: C
NEW QUESTION 18
What fact is true regarding controllers and Aps in a split-MAC architecture?
- A. An IP tunnel is established between the AP and controller for AP management and control functions
- B. Using centralized data forwarding, frames leaving the Aps are never tagged Ethernet frames with VLAN identifiers
- C. Management and data frames must be processed locally by the AP, while control frames are sent to the controller
- D. With 802.1X/EAP security, the AP acts as the supplicant and the controller acts as the authenticator
Answer: A
NEW QUESTION 19
A 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)
- A. A heat map demonstrating signal quality in areas where VoWiFi is supported.
- B. Codec types and sampling rates for each VoWiFi phone
- C. Test results from an active survey with a VoWiFi handset
- D. Security parameters and configuration steps for VoWiFi handsets.
- E. Results of OFDM versus ERP performance in each BSA
Answer: A,C
NEW QUESTION 20
What 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.
- A. 802.1X/EAP, WEP
- B. CCMP, TKIP
- C. RC5, RC4
- D. TLS, SSL
Answer: B
NEW QUESTION 21
What cipher suite is specified by the 802.11-2016 standard and is not deprecated?
- A. Wired Equivalent Privacy
- B. Counter Mode with CBC-MAC Protocol
- C. Temporal Key Integrity Protocol
- D. Extensible Authentication Protocol
Answer: B
NEW QUESTION 22
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?
- A. WPAN
- B. BSS
- C. Ad-hoc
- D. IBSS
Answer: B
NEW QUESTION 23
Option 43 must be configured to allow access points to locate controllers. In what network service should this option be configured?
- A. DNS
- B. LDAP
- C. DHCP
- D. RADIUS
Answer: C
NEW QUESTION 24
What primary metric of scanning can stations use to select the best AP for connectivity to the desired BSS?
- A. Throughput speed in Mbps.
- B. PING latency when testing against an Internet server.
- C. FCS errors in frames transmitted to and from the AP.
- D. Signal strength of AP beacons received.
Answer: D
NEW QUESTION 25
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?
- A. Laptop based spectrum analyzers
- B. Overlay WLAN monitoring solution
- C. AP-based spectrum analysis
- D. laptop-based protocol analyzers
Answer: C
NEW QUESTION 26
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?
- A. OFDM was first introduced in 802.11a and is used by the ERP, HT and VHT PHYs as well.
- B. OFDM implements BPSK modulation to allow for data rates up to 7 Gbps.
- C. OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.
- D. OFDM modulation is used only in 5 GHz 802.11 transmissions.
Answer: A
Explanation:
https://en.wikipedia.org/wiki/IEEE_802.11
NEW QUESTION 27
Which one of the following channels can be used for VHT transmissions?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION 28
What parameter of the client driver should be configured on a Windows computer to optimize moving from one AP to another within the ESS?
- A. ESSID selection
- B. Band preference
- C. SSID selection
- D. Roaming threshold
Answer: D
NEW QUESTION 29
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?
- A. Real-time FFT
- B. Waterfall/Spectrogram
- C. Clients
- D. APs
Answer: B
Explanation:
Explanation
NEW QUESTION 30
During 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 non-802.11 device?
- A. Airtime utilization
- B. Protocols utilized
- C. Channel occupied
- D. Receive sensitivity
Answer: A
Explanation:
Airtime Utilization is a per-channel statistic that defines what percentage of the channel is currently being used, and what percentage is therefore free. Airtime usage can come from: Data traffic to and from client devices. Interference from WiFi and non-WiFi sources. Management overhead from APs and client devices. https://wyebot.com/2019/06/06/understanding-airtime-utilization/
NEW QUESTION 31
What is an advantage of using WPA2-Personal instead of WEP-128 as a security solution for
802.11 networks?
- A. WPA2-Personal uses 802.1X/EAP for authentication, and WEP-128 uses preshared keys
- B. WPA2-Personal uses dynamic encryption keys, and WEP-128 uses static keys
- C. WPA2-Personal is based on IEEE 802.11 industry standards, but WEP is not
- D. WPA2-Personal uses CCMP for encryption, and WEP-128 uses TKIP for encryption
Answer: B
NEW QUESTION 32
You are troubleshooting a client issue on a Windows laptop. The laptop can see and connect to 2.4 GHz APs, but is 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?
- A. The access points are configured to disallow 5 GHz.
- B. The clients are configured to use WPA and 5 GHz channels only support WPA2.
- C. The antennas in the laptop have insufficient gain to detect the 5 GHz signals.
- D. The client drivers are faulty and should be upgraded.
Answer: C
Explanation:
Explanation/Reference:
NEW QUESTION 33
What statement accurately describes the RF cables and connectors that are used in an
802.11 WLAN system?
- A. Two RF connectors of the same type (e.g. SMA), manufactured by different companies, may vary in specifications.
- B. Some RF connectorsdo not cause insertion loss.
- C. Large diameter RF cables cause greater loss than small diameter cables.
- D. 75 and 125 ohms are the typical impedances of 802.11 WLAN connectors.
Answer: A
NEW QUESTION 34
Two 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?
- A. The access points are not synchronized to the same NTP server.
- B. Reflective objects in the area are causing significant multipath.
- C. The access points are mounted too closely to one another.
- D. A client station is using active scanning to probe for access points on multiple channels.
Answer: C
NEW QUESTION 35
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 9 dBi gain, what is the EIRP at the antenna element?
- A. 13 dBm
- B. 26 dBm
- C. 23 dBm
- D. 10 dBm
Answer: C
NEW QUESTION 36
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