Session 2d: PHY Headers and key functions

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The Data Link Layer PDU is called as ________________

1 point

Frame

Packet

Bits

Segment

Which of the following fields defines the type of modulation that must be used to receive the incoming PSDU? *

1 point

The SYNC field

The SFD (Start of Frame De-limiter)

The signal field

The service field

What are the sublayers of physical layer?[Select possible correct answers]
*

1 point

Physical Medium Dependent (PMD) sublayer

Physical Layer Convergence Procedure (PLCP) sublayer

Physical Layer Frame Synchronization (PLFS) Sublayer

Physical Layer Management (PLM) Sublayer

Required

The L-STF is transmitted at 6Mbps using ______________ modulation
*

1 point

QAM

MPSK

QPSK

BPSK

What roles does the preamble serve in Wi-Fi communication?[Select possible correct answers]
*

1 point

Synchronization and Timing

Channel Estimation

Frame Boundary Detection

Error checking

Required

Which technique is commonly used for error checking in data transmission?
*

1 point

Parity Check

Cyclic Redundancy Check

Hamming Code Check

Reed-Solomon Code

Which of the following statements best describes the role of the PMD sub-layer in Wi-Fi technology?

1 point

PMD define the details of transmission and reception of individual bits on a physical medium.

PMD handles data encryption and decryption processes in Wi-Fi networks.

PMD is primarily concerned with error detection and correction in Wi-Fi communication.

PMD ensures the synchronization and timing of data transmission between Wi-Fi devices.

What is the signal detect (SD) threshold, in terms of signal-to-noise ratio (SNR), for most 802.11 radios to detect and decode an 802.11 preamble?

1 point

1dB

4dB

10dB

20dB

The Energy Detect threshold is __________ the signal detect threshold
*

1 point

20 dB higher than

20 dB lower than

4 dB higher than

4 dB lower than

What are the protocols of transport layer *

1 point

ICMP

FTP and DNS

TCP and UDP

DNS

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