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NEW QUESTION # 57
You administer a small WLAN with nine access point. As a small business, you do not rum a RADIUS server and use WPA2-Personal for security. Recently, you changed the passphrase for WPA2-personal in all Aps and clients. Several users are now reporting the inability to connect to the network at time and it is constrained to one area of the building. When using scanner, you see that the AP covering that area is online
- A. The AP that covers the problem area requires a firmware update
- B. The AP that covers the problem area has failed
- C. The AP that covers the problem area is improperly configured
- D. The clients are improperly configured
Answer: A
NEW QUESTION # 58
When an ACK frame is not received by the transmitting STA, what is assumed?
- A. The receiver processed the frame, but did not respond with an ACK frame because Q3
11w is enabled - B. The frame was correctly delivered
- C. The receiver is offline
- D. The frame was not delivered and must be retransmitted
Answer: D
NEW QUESTION # 59
Which directional antenna types are commonly used by indoor Wi-Fi devices in a MIMO multiple spatial stream implementation?
- A. Patch and panel
- B. Dipole and yagi
- C. Dish and grid
- D. Grid and sector
Answer: A
NEW QUESTION # 60
What fact is true regarding controllers and Aps in a split-MAC architecture?
- A. With 802.1X/EAP security, the AP acts as the supplicant and the controller acts as the authenticator
- B. An IP tunnel is established between the AP and controller for AP management and control functions
- C. Management and data frames must be processed locally by the AP, while control frames are sent to the controller
- D. Using centralized data forwarding, frames leaving the Aps are never tagged Ethernet frames with VLAN identifiers
Answer: B
NEW QUESTION # 61
You are performing a post-implementation validation survey. What basic tool can be used to easily locate areas of high co-channel interference?
- A. Laptop-based spectrum analyzer
- B. Access point spectrum analyzer
- C. Throughput tester
- D. Wi-Fi scanner
Answer: D
Explanation:
Explanation
A Wi-Fi scanner is a basic tool that can be used to easily locate areas of high co-channel interference. A Wi-Fi scanner is a software application that can run on a laptop, tablet, smartphone, or other device that has a Wi-Fi adapter. A Wi-Fi scanner can scan the wireless environment and display information about the detected access points and client stations, such as their SSID, BSSID, channel, signal strength, security, and data rate. A Wi-Fi scanner can also show the channel utilization and overlap of different access points, which can indicate the level of co-channel interference. Co-channel interference is a type of interference that occurs when multiple access points use the same or adjacent channels within the same coverage area. Co-channel interference can reduce the throughput and performance of the WLAN, as the access points and client stations have to contend for the channel access and avoid collisions. To identify areas of high co-channel interference, a Wi-Fi scanner can be used to measure the signal strength and channel utilization of different access points and compare them with a threshold or a baseline. Alternatively, a Wi-Fi scanner can also use a color-coded heat map to visualize the co-channel interference level in different locations. References: 1, Chapter 7, page
279; 2, Section 4.3
NEW QUESTION # 62
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?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 63
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 CCMP for encryption, and WEP-128 uses TKIP for encryption
- C. WPA2-Personal is based on IEEE 802.11 industry standards, but WEP is not
- D. WPA2-Personal uses dynamic encryption keys, and WEP-128 uses static keys
Answer: D
NEW QUESTION # 64
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. Codec types and sampling rates for each VoWiFi phone
- B. Security parameters and configuration steps for VoWiFi handsets.
- C. A heat map demonstrating signal quality in areas where VoWiFi is supported.
- D. Test results from an active survey with a VoWiFi handset
- E. Results of OFDM versus ERP performance in each BSA
Answer: C,D
NEW QUESTION # 65
Three access points are used within a facility. One access point is on channel 11 and the other two are on channel 1. The two access points using channel 1 are on either side of the access point using channel 11 and sufficiently apart so that they do not interfere each other when they transmit frames. Assuming no other Aps are in the vicinity, is CCI still a possibility in this network and why?
- A. Yes, because the client devices connected to one of the channel 1 APs will transmit frames that reach the other channel 1 AP as well as
- B. No, because CCI only occurs in the 5 GHz frequency band
- C. No, because the Aps are far enough apart that no CCI will occur
- D. Yes, because channel 11 loops around and causes CCI with channel 1
Answer: A
NEW QUESTION # 66
When implementing PoE, what role is played by a switch?
- A. PSE
- B. PO
- C. Power splitter
- D. Midspan injector
Answer: A
NEW QUESTION # 67
You 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?
- A. Discover the scale of the problem
- B. Perform corrective actions
- C. Create a plan of action or escalate the problem
- D. Verify the solution
Answer: A
NEW QUESTION # 68
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?
- A. RTLS
- B. FTP
- C. E-Mail
- D. VoIP
Answer: D
NEW QUESTION # 69
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?
- A. Load balancing
- B. Band Steering
- C. OKC
- D. FT
Answer: D
Explanation:
https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-1/Enterprise-Mobility-8-1- DesignGuide/Enterprise_Mobility_8-1_Deployment_Guide/Chapter-11.pdf
NEW QUESTION # 70
What is the most effective method for testing roaming in relation to 802.11 VoIP handsets?
- A. Use a protocol analyzer to capture the traffic generated when a laptop roams.
- B. Use a spectrum analyzer to monitor RF activity during a VoIP call.
- C. Place a call with the handset and move around the facility to test quality during roaming.
- D. Use the built-in roaming monitor built into all VoIP handsets.
Answer: C
Explanation:
Explanation
The most effective method for testing roaming in relation to 802.11 VoIP handsets is to place a call with the handset and move around the facility to test quality during roaming. This method allows you to evaluate the actual performance and user experience of VoIP calls over wireless networks, as well as identify any potential issues such as signal strength, interference, latency, jitter, packet loss, or handoff delays. A spectrum analyzer can only show you the RF activity during a VoIP call, but not how it affects the voice quality or roaming behavior. A protocol analyzer can capture the traffic generated when a laptop roams, but it cannot simulate the characteristics of a VoIP handset such as battery life, antenna design, codec support, or QoS features. A built-in roaming monitor is not a common feature in all VoIP handsets, and it may not provide accurate or comprehensive information about the roaming process. References: [CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-107], page 487; [Voice over Wireless LAN 4.1 Design Guide], page 6-19.
NEW QUESTION # 71
You manage a WLAN with 100 802.11ac 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?
- A. The AP is improperly configured to use only 40 MHz of the 80 MHz allocated bandwidth
- B. The short guard interval is also enabled
- C. The clients are all 802.11n STAs or lower
- D. All clients implement single spatial stream radios
Answer: C
NEW QUESTION # 72
In a Wi-Fi client configuration utility, what feature is most likely to be user configurable?
- A. WMM-PS Dozing Interval
- B. 802.1p to WMM mappings
- C. EAP Authentication Type
- D. RADIUS Server IP Address
- E. SNMPv3 Users
Answer: C
NEW QUESTION # 73
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