Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 209
Q3281:
Fill in the blank: In IEEE 802.11, the DCF uses _______ to help prevent collisions on the wireless medium.
A. Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)
B. Direct Transmission Protocol
C. Multiple Access Collision Control (MACC)
D. Channel Access Protocol (CAP)
Correct Answer:
A
Chapter: 209
Q3282:
Which IEEE 802.11 MAC sub-layer is responsible for providing quality of service and prioritization in wireless communication?
A. Enhanced Distribution Function
B. Distributed Coordination Function
C. Control Function
D. Medium Access Control Layer
Correct Answer:
A
Chapter: 209
Q3283:
Fill in the blank: The Enhanced Distribution Function (EDCF) is an extension of _______ that prioritizes traffic for different types of services.
A. Distributed Coordination Function
B. Medium Access Control Layer
C. Enhanced Quality of Service Layer
D. Wireless Access Protocol
Correct Answer:
A
Chapter: 209
Q3284:
What is one key feature of the Enhanced Distribution Function (EDCF) in IEEE 802.11?
A. It prioritizes data traffic based on service types
B. Encrypts wireless transmissions
C. Manages device authentication
D. Allocates IP addresses for devices
Correct Answer:
A
Chapter: 209
Q3285:
Which protocol is used in IEEE 802.11 to manage access to the shared wireless medium?
A. CSMA/CA
B. Direct Access Control
C. Channel Allocation Protocol
D. Carrier Sense Access Control
Correct Answer:
A
Chapter: 209
Q3286:
Fill in the blank: The IEEE 802.11 MAC sub-layer is responsible for _______ in wireless communication.
A. Medium access control
B. IP address management
C. Encryption of data
D. Network routing
Correct Answer:
A
Chapter: 210
Q3287:
IEEE 802.11 defines two MAC sub-layers. Which one is known as PCF?
A. Point Coordination Function
B. Private Communication Function
C. Primary Coordination Function
D. Packet Control Function
Correct Answer:
A
Chapter: 210
Q3288:
What is the primary role of the Point Coordination Function (PCF) in IEEE 802.11?
A. To manage communication in infrastructure mode
B. To encrypt the wireless network
C. To ensure collision-free transmission in ad hoc mode
D. To prioritize traffic based on device types
Correct Answer:
A
Chapter: 210
Q3289:
Which function does the Point Coordination Function (PCF) serve in IEEE 802.11?
A. It schedules data transmissions in an infrastructure mode
B. Manages IP addresses for wireless devices
C. Handles routing protocols for wireless devices
D. Encrypts data during transmission
Correct Answer:
A
Chapter: 210
Q3290:
Fill in the blank: The Point Coordination Function (PCF) is designed to operate in the _______ mode of IEEE 802.11.
A. infrastructure
B. ad hoc
C. hybrid
D. networkless
Correct Answer:
A
Chapter: 210
Q3291:
Which IEEE 802.11 MAC sub-layer is responsible for providing medium access in an infrastructure mode?
A. Distributed Coordination Function (DCF)
B. Point Coordination Function (PCF)
C. Access Control Function (ACF)
D. Extended Distribution Function (EDF)
Correct Answer:
B
Chapter: 210
Q3292:
Fill in the blank: The Point Coordination Function (PCF) in IEEE 802.11 uses _______ to manage data transmission.
A. polling
B. CSMA/CA
C. handshaking
D. quorum voting
Correct Answer:
A
Chapter: 210
Q3293:
Which of the following best describes the main difference between DCF and PCF in IEEE 802.11?
A. DCF is used in ad hoc mode, while PCF is used in infrastructure mode
B. DCF uses polling to access the medium, while PCF uses CSMA/CA
C. PCF is used for point-to-point communication, while DCF is used for broadcast communication
D. DCF provides prioritization, while PCF is for simple data exchange
Correct Answer:
A
Chapter: 210
Q3294:
What mechanism does the Point Coordination Function (PCF) use to allow stations to access the wireless medium?
A. Polling
B. Carrier sense multiple access (CSMA)
C. Encryption keys
D. Direct medium access
Correct Answer:
A
Chapter: 210
Q3295:
Fill in the blank: In IEEE 802.11, the Point Coordination Function (PCF) is part of the _______ sub-layer.
A. Medium Access Control (MAC)
B. Physical Layer
C. Network Layer
D. Application Layer
Correct Answer:
A
Chapter: 210
Q3296:
Which of the following is a key feature of the Point Coordination Function (PCF) in IEEE 802.11?
A. It allows for contention-free access in infrastructure mode
B. It is used for collision detection in the wireless medium
C. It is responsible for encryption of data during transmission
D. It assigns IP addresses to devices
Correct Answer:
B
Chapter: 210
Q3297:
Fill in the blank: The Point Coordination Function (PCF) in IEEE 802.11 provides a _______ mechanism for data transfer.
A. contention-free
B. collision-based
C. secure-only
D. channel-selection
Correct Answer:
A
Chapter: 210
Q3298:
What type of stations are used in the Point Coordination Function (PCF) mode of IEEE 802.11?
A. Stations with a polling mechanism
B. Stations without CSMA/CA support
C. Stations that communicate directly without a coordinator
D. Stations that rely on DCF only
Correct Answer:
A
Chapter: 210
Q3299:
The Point Coordination Function (PCF) in IEEE 802.11 is used to provide which of the following?
A. Collision detection and avoidance
B. Contiguous time slots for each device
C. Encrypted communication between stations
D. Polling-based communication in a structured environment
Correct Answer:
A
Chapter: 210
Q3300:
Fill in the blank: The Point Coordinator in PCF mode is responsible for managing _______ in an IEEE 802.11 wireless network.
A. polling
B. security protocols
C. routing tables
D. data encryption
Correct Answer:
A