Flashcards
01 802.11 Overview
Cards in this deck (20)
- 1802.11-2007 defines which OSI layers?Physical
MAC sublayer - 2Data-Link sublayersUpper - Logical Link Control
Bottom - Media Access Control (MAC) - 3Sublayer which interfaces with lower layer PHY and upper LLC sublayerMAC
- 4MSDUMAC Service Data Unit.
Created when network layer sends data to Data-Link layer from LLC sublayer. - 5MPDUMAC Protocol Data Unit.
Encapsulates the MSDU. - 6Physical layer sublayersUpper - Physical Layer Convergence Procedure (PLCP)
Lower - Physical Medium Dependent (PMD) - 7PSDUPLCP Service Data Unit.
Physical layer's point of view of the MPDU. - 8PPDUPLCP Protocol Data Unit.
Encapsulates PSDU.
Transmitted by PMD. - 9Station ServicesAuthentication
Deauthentication
Data confidentiality (encryption)
MSDU delivery
Dynamic Frequency Selection (DFS)
Transmit power control (TPC)
Higher-layer timer synchronization (QoS facility only)
QoS traffic scheduling (QoS facility only) - 10Distribution System ServicesAssociation
Reassociation
Disassociation
Distribution
Integration
QoS traffic scheduling (QoS facility only) - 11Where does DSS operateAccess points
WLAN controllers - 12Integration Service (IS)Delivery of MSDUs between distribution system and non-IEEE-802.11 LANs.
Removes 802.11 header and trailer and encases MSDU payload in 802.3 frame. - 13802.11 WDS requires how many MAC addresses?Four
- 14The MAC addresses in 802.11 WDSReceiver address (RA)
Transmitter address (TA)
Basic service set identifier (BSSID)
Destination address (DA)
Source address (SA) - 15Three major frame typesManagement
Control
Data - 16MMPDUManagement MAC Protocol Data Unit.
Another name for Management frame. - 1712 management frame subtypesAssociation request
Association response
Reassociation request
Reassociation response
Probe request
Probe response
Beacon
Announcement Traffic Indication Message (ATIM)
Disassociation
Authentication
Deauthentication
Action - 18Control framesAssist delivery of data frames.
Clears the channel
Acquires the channel.
Contains only header info and a trailer. - 198 control frame subtypesPower Save Poll (PS-Poll)
Request to send (RTS)
Clear to send (CTS)
Acknowledgement (ACK)
Contention Free-End (CF-End)
CF-End + CF+ACK
Block ACK Request (BlockAckReq)
Block ACK - 2015 data frame subtypesData
Null function
Data + CF+ACK
Data + CF-Poll
Data + CF-ACK + CF-Poll
CF-ACK
CF-Poll
CF-ACK + CF-Poll
QoS data
QoS null
QoS data + CF-ACK
QoS data + CF-Poll
QoS data + CF-ACK + CF-Poll
QoS CF-Poll
QoS CF-ACK + CF-Poll
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- CWAP CWAP Flashcards on 01 802.11 Overview, created by rowelld on 29/10/2015.
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- rowelld
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