What are the two sub-layers of the data-link layer? - Question and answersLLC and
MAC
What are the two sub-layers of the physical layer? - Question and answersPLCP and
PMD
The IP packet plus LLC data is known as what type of data unit? - Question and
answersMSDU
The Mac sub-layer encapsulates the ------- in the --------. - Question and
answers"MSDU, MPDU"
What does the Mac sub-layer add to the MSDU? - Question and answersMAC header
and Trailer
.--- and --- are the same data unit just different views from layer 1 and 2. What are these
data units? - Question and answers"MPDU, PSDU"
What does the PLCP sub-layer add to the PSDU before sending it to the PDM? -
Question and answers"PHY Preamble, PHY header"
What is the name of the whole data unit passed down to the PMD? - Question and
answersPPDU
What tasks does the (PMD) have? - Question and answersModulates and demodulates
bits
What are the 3 802.11 frame types? - Question and answers"Management, Control,
Data."
What is the MSDU maximum size based on 802.11-2007? - Question and
answers"2,304 bytes."
"The maximum Frame body size based in 802.11-2007 is 2 - Question and answers304
bytes plus what?",Overhead from any encryption
What type of frames carry a MSDU payload in the frame body? - Question and
answersData.
, What make up the three parts of an 802.11 frame? - Question and answers"MAC
header, Frame body, trailer (FCS)"
What is the preamble used for? - Question and answersSynchronizing receiving and
transmitting radios.
What is the required medium used by a Distribution system? - Question and
answers"There is not required medium, but most use 802.3 Ethernet LAN"
What are 8 station services (SS)? - Question and answers"Authentication,
Deauthentication, Data confidentiality (encryption), MSDU delivery, Dynamic frequency
selection (DFS), Transmit power control (TPC), Higher-layer timer synchronization, QoS
traffic scheduling"
What are 6 distribution system services (DSS)? - Question and answers"Association,
Reassociation, Disassociation, Distribution, Integration , QoS traffic scheduling"
What is the main job of the integration service (IS)? - Question and answersTo remove
the 802.11 header and trailer and encase the MSDU payload inside the medium
architecture of the connected network. Example (802.11 to 802.3).
What are the two main differences of 802.11 and 802.3 frames? - Question and
answersSize limit and the number of MAC address fields.
What is another name for a management frame? - Question and answersManagement
MAC Protocol Data Unit (MMPDU)
What does the frame body of a management frame carry? - Question and
answersInformation fields and information elements.
What parts make up a control frame? - Question and answersHeader information and a
trailer. Control frames do not contain a frame body.
What are Null function data frames often used for? - Question and answersClient station
to inform the AP of changes in Power Save status.
What PHY technology do Clause 14 radios use? - Question and answersFrequency
Hopping Spread Spectrum (FHSS)
What PHY technology do Clause 15 radios use? - Question and answersDirect
Sequence Spread Spectrum (DSSS)
What PHY technology do Clause 16 radios use? - Question and answersInfrared (IR)
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