Chapter 1 - The Protocol Flashcards
What is the unit name received at the MAC Sublayer of the Data Link Layer?
a. MSDU
b. MPDU
c. PSDU
d. PPDU
MSDU
Which one of the following is used in transmission and reception of frames in the 802.11 PHYs and is not part of the MPDU?
a. MAC Header
b. FCS
c. Preamble
d. IP Header
Preamble
Which kind of modulation is not used by 802.11 devices operating in the 2.4, 5, or 6 GHz bands today?
a. PSK
b. FSK
c. ASK
d. OFDM
FSK
What modulation method uses both ASK and PSK?
a. BPSK
b. QAM
c. FSK
d. DSSS
QAM
In addition to the coding rate, modulation, and number of spatial streams, what impacts the data rate?
a. Use of A-MPDU
b. TCP segment size
c. IP Payload size
d. Channel bandwidth
Channel bandwidth
What common modulation scheme is used or available in all 802.11 PHYs starting with 802.11a and later?
a. DSSS
b. HR/DSSS
c. ERP
d. OFDM
OFDM
In addition to OFDMA, what is introduced in 802.11ax?
a. Target Wake Time
b. Dynamic Rate Switching
c. Short Guard Interval
d. Aggregated MPDU
Target Wake Time
What is the generic term for a unit received by a layer from the layers above it for processing in the OSI reference model?
a. PDU
b. SDU
c. Segment
d. Packet
SDU (service data unit)
What is a constraint of an A-MPDU assembly?
a. All MPDUs must be targeted to the same TCP port on the machine
b. All MPDUs must be targeted to the same IP port on the machine
c. All MPDUs must be targeted to the same 802.11 STA
d. All MPDUs must be part of the same application stream
All MPDUs must be targeted to the same 802.11 STA
What action is taken after defining the problem, determining the scale of the problem, and identifying probable causes?
a. Capture and analyze the data
b. Document the problem and resolution
c. Choose appropriate remediation steps
d. Escalate the problem
Capture and analyze the data
