Practice Free CWNA-109 Exam Online Questions
Which of these can cause unintentional RF jamming attacks against an 802.11 wireless network? (Choose all that apply.)
- A . Microwave oven
- B . Signal generator
- C . 2.4 GHz cordless phones
- D . 900 MHz cordless phones
- E . Deauthentication transmitter
What are some recommended best practices when deploying a high-density WLAN? (Choose all that apply.)
- A . Deploying unidirectional MIMO patch antennas
- B . Band steering of all clients to 5 GHz
- C . Load balancing
- D . Low AP transmit power
- E . Layer 3 roaming
Which 802.11ax technologies provide for multi-user communications?
- A . OFDM
- B . OFDMA
- C . MIMO
- D . SU-MIMO
- E . MU-MIMO
- F . TWT
- G . SRO
Which methods of EAP can be used for authentication for a Passpoint client to connect to a secure Passpoint SSID? (Choose all that apply.)
- A . EAP-PEAP
- B . EAP-TLS
- C . Anonymous EAP-TLS
- D . EAP-AKA
- E . EAP-LEAP
As XYZ Company’s wireless specialist, you have been asked to troubleshoot some unexpected frame patterns in a wireless protocol capture. Your peers explain that the network’s beacon frames are inconsistent.
That is, the BSSID is the same for all beacons, but the source address varies between three different addresses.
What network configuration would cause this beacon frame behavior?
- A . A single AP supports multiple BSSs with different SSIDs
- B . A virtual cell single channel network has been implemented
- C . The beacons are from an IBSS instead of a BSS
- D . Three APs still share the same default configuration.
Which of the following is the responsibility of the Internet Engineering Task Force (IETF)?
- A . Request for Comments (RFCs)
- B . 802 standards
- C . Wi-Fi CERTIFIED standards
- D . Regulatory domain authority rules
A natural disaster has occurred in a remote area that is approximately 57 miles from the response team headquarters. The response team must implement a local wireless network using 802.11 WLAN access points.
What is the best method, of those listed, for implementation of a network back-haul for communications across the Internet in this scenario?
- A . 802.11 bridging to the response team headquarters
- B . Cellular/LTE/5G
- C . Turn up the output power of the WLAN at the response team headquarters
- D . Temporary wired DSL
B
Explanation:
Cellular/LTE/5G is the best method for implementing a network backhaul for communications across the Internet in a remote area that is affected by a natural disaster. This is because cellular/LTE/5G networks are wireless and do not depend on physical infrastructure that may be damaged or unavailable in such scenarios. Cellular/LTE/5G networks also offer high-speed data transmission and wide coverage area, which are essential for emergency response operations. 802.11 bridging to the response team headquarters is not feasible because it requires line-of-sight and has limited range. Turning up the output power of the WLAN at the response team headquarters is not effective because it may cause interference and does not guarantee reliable connectivity. Temporary wired DSL is not practical because it requires installing cables and equipment that may not be available or accessible in a remote area.
Reference: CWNA-109 Study Guide, Chapter 7: Wireless LAN Topologies, page 2031
A 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?
- A . NTP
- B . DHCP
- C . SNMP
- D . GRE
B
Explanation:
DHCP (Dynamic Host Configuration Protocol) is a commonly used method to locate the controllers by the APs in a WLAN that is implemented using wireless controllers. DHCP is a protocol that allows a device to obtain an IP address and other network configuration parameters from a server. In a wireless controller scenario, the APs can use DHCP to request an IP address from a DHCP server, which can also provide the IP address or hostname of the wireless controller as an option in the DHCP response. This way, the APs can discover the wireless controller and establish a connection with it. Alternatively, the APs can also use other methods to locate the wireless controller, such as DNS (Domain Name System), broadcast or multicast discovery, or manual configuration.
Reference: 1, Chapter 8, page 309; 2, Section 5.2
When calculating the link budget and system operating margin of a point-to-point outdoor WLAN bridge link, what factors should be taken into account? (Choose all that apply.)
- A . Distance
- B . Receive sensitivity
- C . Transmit amplitude
- D . Antenna height
- E . Cable loss
- F . Frequency
An IEEE 802.11 amendment is in the daft state.
What impact does this draft amendment have on the 802.11 standard?
- A . Devices will be released based on the draft amendment and the draft amendment features are part of the standard.
- B . No impact: Until an amendment is ratified, it does not become part of the standard.
- C . No impact: Draft amendments do not become part of the standard until a working group is formed.
- D . The standard is changed to reflect the new capabilities as soon as an amendment enters the draft stage.