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CWNA 802.11 Mac Architecture
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CWNA 802.11 Mac Architecture
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1. An enhanced power MGMT method introduced by the IEEE 802.11e amendment

2. A short gap or period of time that is used during transmission of data

3. An enhanced power-management method introduced by 802.11e amendment.

4. Power MGMT method defined for use by HT radios. PSMP is an extension of automatic power save delivery (APSD) that was defined by the 802.11e amendment

5. Default power management mode for most 802.11 stations. When a station is set for active mode - the wireless station is always ready to transmit or receive data. Active mode is sometimes referred to as Continuous aware mode - and it provides no batte

6. The upper portion of the physical layer. PLCP prepares the frame for transmission by taking the frame from the MAC sublayer and creating the PLCP Protocol Data Unit (PPDU)

7. The extra characters added to a frame and used for error detection and correction

8. Carry the actual data that is passed down from the higher-layer protocols

9. More complexed of the two 802.11 Auth methods. Shared Key authentication uses WEP to authenticate client stations and requires that a static WEP key be configured on both the station and the AP. In addition to WEP being mandatory - authentication wil

10. A special type of TIM that is used to ensure that all stations are awake when multicast or broadcast traffic is sent

11. Prob request management frame with no SSID information

12. Unit of data at the Data-Link Layer

13. After a station has authenticated with the AP the next step is for it to associate with the AP. When a client station associates - it becomes a member of a BSS. Association means that the client station can send data through the AP and on to the Dist

14. A bit in the 802.11 MAC header that is used by the client station to notify the AP that the station is going into Power Save Mode

15. The lower portion of the Physical layer. the PMD sublayer modulates and transmits the data as bits

16. A notification frame used to terminate an authentication. Because authentication is prerequisite for association - disassociation will also occur. Deauthentication cannot be refused by either party

17. Probe request with specific SSIC

18. The MSDU contains data from the LLC and Layers 3-7. A simple definition of the MSDU is the data payload that contains the IP packet plus some LLC data

19. Fixed-length mandatory fields in the body of management frame.

20. Variable-length fields that are optional in the body of management frame

21. A notification frame used to terminate an association. A polite way of terminating the association. Disassociation cannot be refused by either party

22. A unicast frame that is used in an IBSS network when Power Save Mode is enabled. If a station has buffered data for another station it will send an ATIM frame to the other station - informing it that it must stay awake until the next ATIM window so t

23. Authentication is the verification of user identity and credentials. Users must ID themselves and present credentials such as usernames and passwords or digital certificates. More-secure authentication systems exist that require multifactor authentic

24. When a client station decides to roam to a new AP - it will send a reassociation request frame to the new AP. It is called a reassociation not because it is reassociating to the AP - but because it is reassociating to the SSID of the wireless network

25. An 802.11 frame. The components include a MAC header - an MSDU (Data Payload) and the trailer

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