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CWNA-106 Real Exam Questions

Certified Wireless Network Administrator

138 questions available · Page 1 of 14

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Question 1 Single choice

What information is transmitted in the Beacon management frames of an HT access point to communicate about backward compatibility with ERP andHR/DSSS stations? (Choose 2)

  1. A

    HT Protection mode

  2. B

    Secondary channel offset

  3. C

    RIFS mode

  4. D

    Power save mode of clients

Show answer and explanation

Correct answer: A

Question 2 Multiple choice

Whatfactors are likely to cause the greatest impact on the application layer throughput of an 802.11n client station in a 2.4 GHz HT BSS? (Choose 3)

  1. A

    Use of WEP or TKIP for encryption instead of CCMP

  2. B

    Use of passphrase authentication instead of 802.1X/EAPauthentication

  3. C

    Increasing the beacon interval from 100 to 200 (TUs)

  4. D

    RF interference from more than 10 nearby Bluetooth transmitters

  5. E

    Increasing or decreasing the number ofspatial streams in use by the client station and AP

Show answer and explanation

Correct answers: A, D, E

Question 3 Single choice

When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs respond?

  1. A

    After waiting a SIFS, all APs reply at the same time witha probe response.

  2. B

    After waiting a SIFS, a designated AP sends an ACK, and then replies with a probe response.

  3. C

    Each AP checks with the DHCP server to see if it can respond and then acts accordingly.

  4. D

    For each probe request frame, only one AP may reply with a probe response.

  5. E

    Each AP responds in turn after preparing a probe response and winning contention.

Show answer and explanation

Correct answer: E

Question 4 Single choice

When planning an access point deployment that utilizes Power over Ethernet (PoE) switches at the network edge, what design decision could adversely affect the operation of 802.3-2012, Clause 33 APs?

  1. A

    All ports on theEthernet switch will be supporting Class 3 PoE powered devices.

  2. B

    Some APs are connected to a PoE switch and are also receiving power from an AC outlet.

  3. C

    The Ethernet switch uplink ports are not connected to an 802.3-2012, Clause 33- compliant core or distribution Ethernet switch.

  4. D

    A gigabit Ethernet switch port supporting an 802.11a/g AP auto-negotiates to 100 Mbps.

Show answer and explanation

Correct answer: A

Question 5 Single choice

As a station moves away from the access point to which it is associated, it changes its data rate from 600

Mbps to 540 Mbps and then to 450 Mbps.

What IEEE 802.11 term or phase is used to describe this functionality?

  1. A

    Dynamic Rate Switching

  2. B

    Multirate Control

  3. C

    Modulation and Coding Selection

  4. D

    Rate Set Selectivity

Show answer and explanation

Correct answer: A

Question 6 Single choice

What term correctly completes the following sentence?

802.11a/b/g used a mandatory 800ns guard interval. 802.11n introduced anoptional short 400ns guard interval. Guard intervals (GI) are necessary in OFDM to reduce the likelihood of interference between two consecutive ____________.

  1. A

    Frames

  2. B

    Packets

  3. C

    Bits

  4. D

    Symbols

Show answer and explanation

Correct answer: D

Question 7 Single choice

What feature was introduced in the 802.11h amendment in order to uphold regulatory requirements for 5
GHz operations.

  1. A

    256-QAM

  2. B

    Distributed Coordination Function (DCF)

  3. C

    Transmit Power Control(TPC)

  4. D

    Radio Resource Management (RRM)

Show answer and explanation

Correct answer: C

Question 8 Multiple choice

You are anindependent contractor, hired to perform an indoor site survey and network design for Luxury Full Service Hotels International. The network will support hotel staff and guest users. You are interviewing the network manager to determine business, performance, and security requirements for the future 802.11 WLAN.

What questions should you ask the IT manager? (Choose 2)

  1. A

    What data cabling is currently installed in the rooms and throughout the hotel?

  2. B

    How much RF loss do you expect between hotel rooms?

  3. C

    Who installed your existing wired network?

  4. D

    What types of applications will be used by the hotel staff?

  5. E

    On what frequency do the microwave ovens operate in the hotel suites?

Show answer and explanation

Correct answers: A, D

Question 9 Multiple choice

Why is it recommended for a wireless network administrator to disable 1 Mbps and 2 Mbps data rates on the WLANinfrastructure? (Choose 2)

  1. A

    To improve capacity in the BSS

  2. B

    To reduce the size of the AP's effective service area

  3. C

    Toprevent 802.11b devices from associating

  4. D

    To maximize the range of the highest data rates

  5. E

    To prevent VoWiFi multicast frames

  6. F

    To enable support for long preambles

Show answer and explanation

Correct answers: A, B

Question 10 Multiple choice

In an 802.11 2.4 GHz system, what 22 MHz channels are considered non-overlapping? (Choose 2)

  1. A

    Channels 5 and 10

  2. B

    Channels 1 and 5

  3. C

    Channels 3 and 7

  4. D

    Channels 2 and 8

  5. E

    Channels 8 and 11

  6. F

    Channels 10 and 13

Show answer and explanation

Correct answers: A, D