HR-DSSS (Clause 18) - amount of space to not be overlapping? - Question and
answers25 MHz from center to be non-overlapping.
The upper portion of the Physical layer is known as the _____________, and the lower
potion is known as the ___________. - Question and answersPLCP, PMD.
What three parts make up the PPDU? - Question and answers-PLCP Header
-PLCP Preamble
-PSDU
The Long PPDU includes a _________-bit PLCP Preamble which consists of a
___________-bit Synch field. - Question and answersThe Long PPDU includes a 144-
bit PLCP Preamble, which consists of a 128-bit Sych field and a 16-bit Start of Frame
Delimiter (SDF).
Both the Long and Short Preambles are transmitted using which modulation technique?
- Question and answersThe Long Preamble is transmitted using Differential Binary
Phase Shirt Keying (DBPSK) at the rate of 1 Mbps. Like the Long Preamble, the Short
PLCP Preamble is also transmitted using DBPSK.
Which of the following fields are contained in the Long and Short PLCP Headers? -
Question and answersLong and Short PLCP headers are both 48 bits long and contain:
-Signal (8 bits)
-Service (8 bits)
-Length (16 bits)
-CRC (16 bits)
Which PPDUs were defined by the 802.11 amendment? - Question and answersnon-HT
Legacy PPDU
HT-mixed PPDU
HT-greenfield PPDU
Which of the following define radios that can transmit in the 2.4 GHz ISM band?
A. Clause 14
B. Clause 15
C. Clause 18
D. Clause 19
E. Clause 20 - Question and answersA, B, C, D, E
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