CWNA-107 Free Practice Test

What statement about 802.11 WLAN bridges is true?

1. A. WLAN bridges only work in the 2.4 GHz frequency band and they support only SISO communications
2. B. WLAN bridges must use a channel with acceptable SNR at both transceivers to maintain the desired data rate bi-directionally
3. C. WLAN bridges may support MIMO communications, but only if used in the 5 GHz frequency band
4. D. WLAN bridges must be implemented such that no interference occurs on the channel anywhere between the two endpoints used to establish the bridge

Correct Answer: C

ABC Company is planning to install a new 802.11ac WLAN, but wants to upgrade its wired infrastructure first to provide the best user experience possible. ABC Company has hired you to perform the RF site survey. During the interview with the network manager, you are told that the new Ethernet edge switches will support VoIP phones and 802.11 access points, both using 802.3 PoE.
After hearing this information, what immediate concerns do you note?

1. A. The power budget in the edge switches must be carefully planned and monitored based on the number of supported PoE devices.
2. B. The edge Ethernet switches should support Ether-channel to get the best results out of the network.
3. C. VoIP phones and 802.11 access points should not be powered by the same edge switch due to distortion.
4. D. If the switches are in optimal locations for VoIP phones, they are likely to be suboptimal locations for 802.11 APs

Correct Answer: A

You recently purchased four laptops containing dual-band 802.11ac adapters. The laptops can connect to your 2.4 GHz network, but they cannot connect to the 5 GHz network. The laptops do not show the 5 GHz SSIDs, which are different that the 2.4 GHz SSIDs. Existing devices can connect to the 5 GHz SSIDs with no difficulty. What is the likely problem?

1. A. Interference from no-Wi-Fi sources
2. B. Faulty drivers
3. C. DoS attack
4. D. Interference from other WLANs

Correct Answer: D