Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
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
View Answer
A
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
View Answer
A
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
View Answer
A
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
View Answer
C
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)
View Answer
C
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
View Answer
A
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)
View Answer
A
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
View Answer
A
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
View Answer
A
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
View Answer
A