Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 121
Q1701:
Fill in the blank: The ______ layer is associated with managing physical circuits in networking.
A. Physical
B. Transport
C. Datalink
D. Session
Correct Answer:
A
Chapter: 121
Q1702:
Which is NOT a characteristic of datagram switching?
A. Each packet takes different paths
B. Packets follow virtual paths
C. No prior setup required
D. Used at the network layer
Correct Answer:
B
Chapter: 122
Q1703:
A virtual-circuit network is a cross between ______.
A. circuit-switched and datagram networks
B. datagram and token-ring networks
C. circuit-switched and mesh networks
D. packet and TDM networks
Correct Answer:
A
Chapter: 122
Q1704:
Which of the following statements is TRUE about virtual circuits?
A. They use different paths for each packet
B. They don’t require any setup
C. They use fixed physical paths
D. They follow a predefined logical path
Correct Answer:
D
Chapter: 122
Q1705:
Fill in the blank: Virtual circuits are managed at the ______ level within a switch.
A. local switch
B. scope-based
C. global hardware
D. application-level
Correct Answer:
A
Chapter: 122
Q1706:
What is the scope of a virtual circuit label like vc1 in a network switch?
A. Global
B. Local
C. Session-based
D. Encrypted
Correct Answer:
B
Chapter: 122
Q1707:
In a virtual-circuit network, a packet carries which of the following identifiers?
A. IP Address
B. MAC Address
C. Virtual Circuit Identifier (VCI)
D. Port Number
Correct Answer:
C
Chapter: 122
Q1708:
Which of the following is TRUE about a Virtual Circuit Identifier (VCI)?
A. It changes from switch to switch
B. It remains same end-to-end
C. It is the IP address of the node
D. It is used only in datagram networks
Correct Answer:
A
Chapter: 122
Q1709:
Fill in the blank: A virtual circuit exists only ______.
A. after the teardown phase
B. is setup globally
C. is setup and maintained locally in each switch
D. is encrypted end-to-end
Correct Answer:
C
Chapter: 122
Q1710:
What happens to a virtual circuit after teardown?
A. It becomes static
B. It’s reserved permanently
C. It is deleted from local switch tables
D. It is reassigned randomly
Correct Answer:
C
Chapter: 122
Q1711:
In virtual-circuit networks, which of the following is NOT true?
A. Setup is required before data transmission
B. All packets follow the same path
C. Each packet is independently routed
D. Packets contain virtual circuit numbers
Correct Answer:
C
Chapter: 122
Q1712:
Which of these is not an element of a virtual circuit?
A. Connection setup
B. Connection teardown
C. Global path reservation
D. Data transfer
Correct Answer:
C
Chapter: 122
Q1713:
Fill in the blank: In virtual-circuit networks, the label used to identify the path is called ______.
A. MAC
B. VCI
C. Port
D. Socket
Correct Answer:
B
Chapter: 123
Q1714:
What are the two main technologies used in circuit switching today?
A. Packet switching and multiplexing
B. Space-Division and Packet Switching
C. Space-Division and Time-Division Switching
D. Multiplexing and Broadcasting
Correct Answer:
C
Chapter: 123
Q1715:
What does a Time-Division Switch use inside the switch?
A. Space Allocation
B. Packet Buffers
C. Time-Slot Interchange (TSI)
D. Multiplexed Frames
Correct Answer:
C
Chapter: 123
Q1716:
Which switch type connects inputs to outputs directly via a grid-like structure?
A. Multistage Switch
B. Crossbar Switch
C. Router
D. Bridge
Correct Answer:
B
Chapter: 123
Q1717:
The most popular technology used in Time-Division Switching is ______.
A. Time Multiplexing
B. Frame Switching
C. Time-Slot Interchange
D. Serial Conversion
Correct Answer:
C
Chapter: 123
Q1718:
A Crossbar switch with 3 inputs and 4 outputs will have how many crosspoints?
A. 12
B. 7
C. 9
D. 10
Correct Answer:
A
Chapter: 123
Q1719:
Time-Division Switching is based on which technique?
A. CSMA
B. FDMA
C. TDM
D. OFDM
Correct Answer:
C
Chapter: 123
Q1720:
Which switch allows reuse of the same time slots at different stages to save space?
A. Crossbar Switch
B. Single-stage Switch
C. Multistage Switch
D. Hub Switch
Correct Answer:
C