Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 208
Q3261:
Which of the following describes the basic service set (BSS)?
A. A single access point and all the devices connected to it
B. Multiple access points forming a larger network
C. A central hub connecting devices
D. None of the above
Correct Answer:
A
Chapter: 208
Q3262:
Which of the following is an example of Extended Service Set (ESS)?
A. A single access point used to connect all devices
B. A network of access points working together to cover a larger area
C. A single router handling multiple devices
D. None of the above
Correct Answer:
B
Chapter: 208
Q3263:
Which of the following types of mobility does not involve transitions between access points?
A. No-Transition Mobility
B. BSS-Transition Mobility
C. ESS-Transition Mobility
D. All of the above
Correct Answer:
A
Chapter: 208
Q3264:
Fill in the blank: ESS-Transition Mobility involves mobility across _______ within a large wireless network.
A. access points
B. routers
C. devices
D. servers
Correct Answer:
A
Chapter: 208
Q3265:
Which of the following is true about No-Transition Mobility?
A. Devices do not change their access points while moving
B. Devices transition between multiple access points
C. Devices are always connected to the same access point
D. None of the above
Correct Answer:
A
Chapter: 208
Q3266:
Which of the following is a feature of the Extended Service Set (ESS)?
A. Devices can move between multiple access points without losing connection
B. Devices must always remain connected to the same access point
C. Devices can only communicate within a single BSS
D. None of the above
Correct Answer:
A
Chapter: 208
Q3267:
What is the role of Wi-Fi in wireless networks?
A. It defines the physical and data link layer specifications for wireless networks
B. It specifies the higher layers of wireless communication
C. Wi-Fi is unrelated to wireless networks
D. None of the above
Correct Answer:
A
Chapter: 208
Q3268:
Which of the following types of stations is part of IEEE 802.11's mobility categories?
A. BSS-Transition Mobility
B. ESS-Transition Mobility
C. No-Transition Mobility
D. All of the above
Correct Answer:
D
Chapter: 208
Q3269:
Fill in the blank: In IEEE 802.11, _______ defines the mobility where a device moves between access points in the ESS.
A. ESS-Transition Mobility
B. BSS-Transition Mobility
C. No-Transition Mobility
D. Fixed Mobility
Correct Answer:
A
Chapter: 208
Q3270:
What is the primary function of the IEEE 802.11 standard?
A. To define wireless Ethernet connectivity
B. To manage wired networking protocols
C. To define cellular network specifications
D. To regulate Bluetooth protocols
Correct Answer:
A
Chapter: 209
Q3271:
IEEE 802.11 defines two MAC sub-layers. Which one is known as DCF?
A. Distributed Coordination Function
B. Distributed Control Function
C. Direct Control Function
D. Direct Coordination Function
Correct Answer:
A
Chapter: 209
Q3272:
What does the Distributed Coordination Function (DCF) in IEEE 802.11 do?
A. Handles channel access for stations
B. Determines encryption keys
C. Manages routing protocols
D. Provides data integrity checking
Correct Answer:
A
Chapter: 209
Q3273:
The Distributed Coordination Function (DCF) is responsible for _______ in IEEE 802.11.
A. Channel access for wireless devices
B. Encrypting the data being transmitted
C. Defining IP addresses
D. Providing routing tables
Correct Answer:
A
Chapter: 209
Q3274:
Which layer of the OSI model does the IEEE 802.11 MAC sub-layer operate at?
A. Physical layer
B. Network layer
C. Data link layer
D. Application layer
Correct Answer:
C
Chapter: 209
Q3275:
Fill in the blank: The IEEE 802.11 MAC sub-layers are divided into the _______ and the Distributed Coordination Function (DCF).
A. Basic Service Set (BSS)
B. Extended Service Set (ESS)
C. Enhanced Distribution Function (EDF)
D. Control Function (CF)
Correct Answer:
C
Chapter: 209
Q3276:
What is the purpose of the Distributed Coordination Function (DCF) in IEEE 802.11?
A. It ensures fair access to the shared wireless medium for all devices
B. It establishes communication protocols between different routers
C. It manages the encryption of data in a wireless network
D. It defines the access method for wired networks
Correct Answer:
A
Chapter: 209
Q3277:
Which of the following protocols is used by the Distributed Coordination Function (DCF) for medium access control?
A. CSMA/CA
B. Carrier Sense Multiple Access (CSMA)
C. Multiple Access Collision Avoidance (MACA)
D. Direct Access Control (DAC)
Correct Answer:
A
Chapter: 209
Q3278:
Fill in the blank: DCF is designed to provide _______ in wireless networks by avoiding collisions.
A. Access control for data transmission
B. Encryption keys
C. Real-time data exchange
D. Access points for extended services
Correct Answer:
A
Chapter: 209
Q3279:
Which IEEE 802.11 MAC sub-layer is used to avoid collisions during wireless transmission?
A. Distributed Coordination Function
B. Enhanced Distribution Function
C. Access Control Layer
D. Medium Access Control Layer
Correct Answer:
A
Chapter: 209
Q3280:
Which of the following describes the function of the DCF in IEEE 802.11?
A. It ensures fair channel access through CSMA/CA protocol
B. It handles IP address assignment
C. It provides a routing protocol for large networks
D. It manages security keys for transmission
Correct Answer:
A