CWNA Chapter 9

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1. The three major frame types for the 802.11 standard are: management, _______, and data. Fill in the blank.
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2. This authentication method used WEP and requires that a static key be configured on both the station and the Access Point and will not work if the keys do not match.
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3. This is better known as a notification and a polite way of terminating the association, such as shutting off a client through the Operating System, An AP can also do this for maintenance on the networks.
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4. A detrimental trait of the ____ band is that it is not only associated with WLAN networking but also many other type of devices including microwaves, baby monitors, cordless telephones, and video cameras.
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5. How does a client station indicate that it is using Power Save mode?
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6. TCP/IP, the most common communications protocol used on networks, typically has an IP _____ size of 1,500 bytes.
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7. This is one of the most important frame types and is essential to the heartbeat of the wireless network. Time stamps, channel information, data rates, and SSID can all be found in this frame.
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8. If the AP is buffering data for a station in Power Save mode, when the AP transmits to the next beacon, this will be seen on a frame known as the ____.
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9. These _____ frames are used by wireless stations to join and leave the basic service set (BSS) and are the majority of frame types in a WLAN.
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10. This term stands for the breaking of an 802.11 frame into smaller pieces, adds header information to each fragment, and then transmits them individually.
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11. This mode is optional for 802.11 stations and when the client is set for this particular mode it will shut down the transceiver components for a period of time to conserve power. The wireless card takes a short nap.
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12. When the Network layer (layer 3) sends data to the Data-Link layer, that data is handed off to the LLC and becomes known as the MAC _____.
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13. This provides authentication without performing any type of client verification and just an exchange of hellos between the client and Access Point.
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14. This is part of the 802.11 standard and allows for the ability of client stations to transition from one AP to another while maintaining network connectivity for the upper-layer applications.
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15. In order for a client station to participate in a BASS, it must be able to communicate with the AP. What is the name used for the mechanism that performs a NAV distribution and helps prevent collisions from occurring?
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16. This is the default operational mode of most 802.11 AP's and is often called _____. Support for DSSS, HR-DSSS, and OFDM are enabled.
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17. WLAN users have recently complained about gaps in audio and problems with the push-to-talk capabilities with the ACME Company's VoWiFi phones. What could be the cause of this problem?
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18. This is used to encourage dual-band clients to connect using 5GHz transmissions instead of 2.4GHz.
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19. This 802.11 standard is divided into two sublayers known as the LLC and MAC.
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20. This is used strictly as a protection mechanism for mixed-mode environments and is used as a protection mechanism for throughput so that it will be higher due to fewer frames being sent.
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21. WMM-PS is based on which 802.11-2007 power management method?
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22. This is used by the client stations to inform the AP of changes in Power Save by changing the Power Management bit.
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23. The 802.11n-2009 amendment defines two new power-management methods. The first method is _____ and the purpose of this method is to enable MIMO 802.11n device to power down all but one of its radio chains.
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24. In this mode a client station transmits management frames known as probe requests containing a specific SSID of the WLAN that the client station is looking for.
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25. This is used to ensure that all stations using power management are awake when multicast or broadcast traffic is sent.
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26. This is one of the nine control frames and one of the key components of the 802.11 CSMA/CA media access method. This frame consists of 14 octets of information and is the highest priority frame due to the half-duplex nature of the medium.
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27. This operational mode on the AP will only communicate with client stations that are using ERP-OFDM technology and DSSS and HR-DSSS will be disabled and no longer be able to associate with the AP.
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28. These ____ frames carry what is passed down from the higher-layer protocols and are normally encrypted for data privacy reasons.
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29. On any autonomous AP, cooperative AP, or WLAN controller, specific data rates can be configured as ____ rates.
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30. In this mode a client station listens for the beacon frames that are continuously being sent by the Access Points with the SSID that's been preconfigured.
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31. All stations must periodically wake up and notify each other if any station has buffered data that needs to be delivered to another station and this recurring period of time to be awake is known as _____.
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32. When using this operational mode only support for DSSS and HR-DSSS technology is solely enabled.
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33. This is the default power-management mode for most 802.11 stations. When a station is set to this mode the wireless station is always ready to transmit or receive data. This method is sometimes referred to ____.
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34. The 802.11n-2009 amendment has two methods of power-management. This method has been defined for the use of HT radios.
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35. This means that the client station can send data through the Access Point and one the distribution system medium and this is a request sent to the Access Point seeking permission to join.
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36. When a client station decides to roam to a new AP, it will send this request frame to the new AP. This is done not for the AP but instead the SSID of the wireless network.
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37. Which of the following contains only LLC data and the IP packet, but does not include any 802.11 data?
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38. This frame, out of the 15 types, is the most common data frame which has MSDU upper-layer information encapsulated in the frame body.
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39. The 802.11 frame that contains a layer 2 header, a frame body, and a trailer. The trailer has a 32-bit CRC which is known as the.
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40. These ____ frames are used to assist with the delivery of the data frames and are transmitted at one of the basic rates and are also used to clear the channel, acquire the channel, and provide unicast frame acknowledgements.
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The three major frame types for the 802.11 standard are: management,...
This authentication method used WEP and requires that a static key be...
This is better known as a notification and a polite way of terminating...
A detrimental trait of the ____ band is that it is not only associated...
How does a client station indicate that it is using Power Save mode?
TCP/IP, the most common communications protocol used on networks,...
This is one of the most important frame types and is essential to the...
If the AP is buffering data for a station in Power Save mode, when the...
These _____ frames are used by wireless stations to join and leave the...
This term stands for the breaking of an 802.11 frame into smaller...
This mode is optional for 802.11 stations and when the client is set...
When the Network layer (layer 3) sends data to the Data-Link layer,...
This provides authentication without performing any type of client...
This is part of the 802.11 standard and allows for the ability of...
In order for a client station to participate in a BASS, it must be...
This is the default operational mode of most 802.11 AP's and is...
WLAN users have recently complained about gaps in audio and problems...
This is used to encourage dual-band clients to connect using 5GHz...
This 802.11 standard is divided into two sublayers known as the LLC...
This is used strictly as a protection mechanism for mixed-mode...
WMM-PS is based on which 802.11-2007 power management method?
This is used by the client stations to inform the AP of changes in...
The 802.11n-2009 amendment defines two new power-management methods....
In this mode a client station transmits management frames known as...
This is used to ensure that all stations using power management are...
This is one of the nine control frames and one of the key components...
This operational mode on the AP will only communicate with client...
These ____ frames carry what is passed down from the higher-layer...
On any autonomous AP, cooperative AP, or WLAN controller, specific...
In this mode a client station listens for the beacon frames that are...
All stations must periodically wake up and notify each other if any...
When using this operational mode only support for DSSS and HR-DSSS...
This is the default power-management mode for most 802.11 stations....
The 802.11n-2009 amendment has two methods of power-management. This...
This means that the client station can send data through the Access...
When a client station decides to roam to a new AP, it will send this...
Which of the following contains only LLC data and the IP packet, but...
This frame, out of the 15 types, is the most common data frame which...
The 802.11 frame that contains a layer 2 header, a frame body, and a...
These ____ frames are used to assist with the delivery of the data...
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