Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 179
Q2701:
Which is a key advantage of CDMA over TDMA?
A. Code uniqueness
B. Time synchronization
C. Bandwidth limitation
D. User queuing
Correct Answer:
A
Chapter: 179
Q2702:
CDMA differs from TDMA in which of the following ways?
A. TDMA uses different frequencies
B. CDMA uses time sharing
C. CDMA allows simultaneous data transmission for all users
D. CDMA limits access based on traffic load
Correct Answer:
C
Chapter: 179
Q2703:
In CDMA, all users use the same frequency band ______.
A. at different times
B. using unique codes
C. with limited access
D. in sequence
Correct Answer:
B
Chapter: 179
Q2704:
Fill in the blank: FDMA divides the bandwidth into separate frequency channels, while CDMA ______.
A. divides time into slots
B. assigns different codes to users
C. uses packet switching
D. blocks simultaneous access
Correct Answer:
B
Chapter: 179
Q2705:
Which method allows better simultaneous use of bandwidth?
A. FDMA
B. TDMA
C. CDMA
D. FDM
Correct Answer:
C
Chapter: 179
Q2706:
What happens to the entire bandwidth in CDMA?
A. Divided among users
B. Divided into time slots
C. Used by all users with unique codes
D. Assigned per session
Correct Answer:
C
Chapter: 179
Q2707:
CDMA is more efficient than TDMA because it allows ______.
A. users to wait for their time slot
B. users to use unique frequencies
C. all users to send data at the same time
D. using different modulation
Correct Answer:
D
Chapter: 180
Q2708:
Ethernet operates primarily at which layer of the OSI model?
A. Network layer
B. Transport layer
C. Data-link layer
D. Session layer
Correct Answer:
C
Chapter: 180
Q2709:
The data-link and physical layers are part of which type of networks?
A. Local and wide area networks
B. Only wireless networks
C. Only the internet
D. Transport networks
Correct Answer:
A
Chapter: 180
Q2710:
The Ethernet protocol is primarily used in which type of network?
A. Local Area Network (LAN)
B. Wide Area Network (WAN)
C. Metropolitan Area Network (MAN)
D. Virtual Private Network (VPN)
Correct Answer:
A
Chapter: 180
Q2711:
Fill in the blank: The Ethernet protocol functions at the ______ and physical layer of the OSI model.
A. application
B. network
C. data-link
D. transport
Correct Answer:
C
Chapter: 180
Q2712:
Which type of networks can be either wired or wireless?
A. Local and wide area networks
B. Only LANs
C. Only WANs
D. Only peer-to-peer networks
Correct Answer:
A
Chapter: 180
Q2713:
Which of the following is a characteristic of wired networks?
A. Higher mobility
B. Physical cable connection
C. Slower speeds
D. Signal interference
Correct Answer:
B
Chapter: 180
Q2714:
Which layer is responsible for physical transmission of data over the medium?
A. Application layer
B. Session layer
C. Transport layer
D. Physical layer
Correct Answer:
D
Chapter: 180
Q2715:
Fill in the blank: In a wireless network, data is transmitted through ______.
A. ethernet cables
B. light pulses
C. electromagnetic waves
D. copper wires
Correct Answer:
C
Chapter: 180
Q2716:
Which of the following is true about the physical layer?
A. It routes packets
B. It defines how bits are transmitted
C. It handles user login
D. It runs browser protocols
Correct Answer:
B
Chapter: 180
Q2717:
What is a primary role of the data-link layer?
A. Error detection and frame synchronization
B. Route optimization
C. User authentication
D. Signal amplification
Correct Answer:
A
Chapter: 180
Q2718:
In Ethernet communication, data is organized in ______.
A. frames
B. packets
C. chunks
D. streams
Correct Answer:
A
Chapter: 180
Q2719:
Wired Ethernet networks typically use which type of cable?
A. Optical fiber
B. Coaxial cable
C. Twisted pair cable
D. All of the above
Correct Answer:
D
Chapter: 180
Q2720:
Which of the following best describes Ethernet?
A. Wireless protocol
B. Wired protocol used in LAN
C. Protocol used for internet routing
D. Email transfer protocol
Correct Answer:
B