CWNP CWNA-109 Übungsprüfungen
Zuletzt aktualisiert am 07.05.2025- Prüfungscode: CWNA-109
- Prüfungsname: Certified Wireless Network Administrator
- Zertifizierungsanbieter: CWNP
- Zuletzt aktualisiert am: 07.05.2025
Which 802.11 amendments provide for throughput of 1 Gbps or higher? (Choose all that apply.)
- A . 802.11aa
- B . 802.11ab
- C . 802.11ac
- D . 802.11ad
- E . 802.11ae
- F . 802.11af
As a consultant, you’ve been hired by XYZ Company to provide recommendations about client device selection, operation, and interoperability.
What information should be considered to help them choose the right WLAN client devices?
- A . 802.11n OFDM is more susceptible to high-power, narrowband interference than 802.11a
- B . In order to earn Wi-Fi Alliance certification, 802.11n clients stations are required to support both 2.4 and 5 GHz frequencies
- C . 802.11ac devices support the features of the VHT PHY only in the 5 GHz frequency band.
- D . 802.11ac is not backwardly compatible with 802.11n or 802.11a.
- E . When HR/DSSS devices are present, VHT MCS rates are disabled for the entire BSS.
Which type of organization often has a person responsible for keeping track of frequency usage inside the organization?
- A . Law enforcement
- B . Hotspot
- C . Hospital
- D . Cruise ship
As defined in the 802.11 specification, legacy Power Save requires an inefficient back-and-forth frame exchange process. Due to this inefficiency, many WLAN device implementations use a variation of 802.11 Power Save to accomplish the same function.
What non-standard power save behavior is used by most Wi-Fi devices in actual legacy Power Save implementations?
- A . Client devices ignore the TIM field and automatically send PS-Poll frames after every beacon.
- B . After each beacon, the AP attempts to empty its frame buffer by sending Wake-on-WLAN frames to wake each dozing client.
- C . Request-to-Send and Clear-to-Send frame exchanges are used to trigger the delivery of buffered data.
- D . The Beacon interval is changed from the default 100 time units to 10 or less time units.
- E . Clients send null data frames to the AP and switch the power management bit from 1 to 0 to receive queued data.
- F . Stations send a CTS-to-self frame to the AP with a very long duration period so they can receive all of their buffered data at once.
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 . CCMP, TKIP
- B . 802.1X/EAP, WEP
- C . TLS, SSL
- D . CCKM, WEP
- E . RC5, RC4
_____________ is a period of time that exists between transmissions of wireless frames.
- A . Interframe Space
- B . Distributed Coordination
- C . Carrier Sense
- D . Point Coordination Function
ABC Hospital is planning a Wi-Fi infrastructure upgrade where the 802.11b/g APs (HR/DSSS and ERP) would be replaced with new dual-radio 802.11n/802.11ac (HT and VHT) APs. ABC wants to minimize the time and cost associated with performing a new site survey, so they will be mounting all of the new APs in the same locations and with the same cable drops as the existing APs.
What is one performance drawback with this deployment method?
- A . Multipath will increase, causing excessive layer-2 retransmissions. The retransmissions will cause latency for VoWiFi handsets.
- B . Increased receiver sensitivity on the VHT APs will cause them to continually change channels to avoid co-channel interference.
- C . If the existing UTP cabling is not Category 3 or better, the total Ethernet backhaul for each AP will be limited to 100 Mbps.
- D . The existing WLAN plan, including the AP locations, may not provide the benefits seen in HT and VHT 802.11 PHY capabilities.
Several users are complaining that their VoWiFi phones keep losing connectivity.
The WLAN administrator notices that the frame transmissions of the VoWiFi phones are corrupted when listened to with a protocol analyzer near the access point but are not corrupted when listened to with the protocol analyzer near the VoWiFi phone.
What is the most likely cause of this problem?
- A . RF interference
- B . Multipath
- C . Hidden node
- D . Adjacent channel interference
- E . Mismatched power settings
Which of these protocols can be used to configure WLAN infrastructure devices?
- A . HTTP
- B . SSH
- C . SNMP
- D . Telnet
- E . HTTPS
- F . SNMP
- G . All of the above
An 802.11n (HT) network can operate on which frequency bands? (Choose all that apply.)
- A . 902C928 MHz
- B . 2.4C2.4835 GHz
- C . 5.15C5.25 GHz
- D . 5.47C5.725 GHz