Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 120
Q1681:
Fill in the blank: A virtual-circuit network requires a ______ before communication begins.
A. packetization
B. broadcast
C. session setup
D. link reset
Correct Answer:
C
Chapter: 120
Q1682:
The term "virtual" in virtual-circuit refers to ______.
A. a real physical wire
B. a simulated dedicated path
C. a wireless connection
D. a circuit board
Correct Answer:
B
Chapter: 120
Q1683:
How are packets treated in a virtual-circuit network?
A. As independent units
B. As datagrams
C. With shared routing
D. As part of a predefined path
Correct Answer:
D
Chapter: 120
Q1684:
Which of the following steps is **not** part of virtual-circuit communication?
A. Connection setup
B. Packetization
C. Address randomization
D. Connection teardown
Correct Answer:
C
Chapter: 120
Q1685:
Virtual-circuit networks offer a path that is ______ during the communication session.
A. dynamically routed
B. dedicated but virtual
C. encrypted
D. randomly assigned
Correct Answer:
B
Chapter: 120
Q1686:
What is the key benefit of virtual-circuit switching?
A. Improved packet independence
B. Guaranteed bandwidth and path
C. Packets follow random paths
D. No need for routing tables
Correct Answer:
B
Chapter: 120
Q1687:
In a virtual-circuit network, teardown occurs ______.
A. before setup
B. at the end of communication
C. during each packet transmission
D. randomly
Correct Answer:
B
Chapter: 120
Q1688:
Fill in the blank: In virtual-circuit networks, all packets take the ______.
A. best-effort route
B. dedicated path
C. direct link
D. static IP
Correct Answer:
B
Chapter: 120
Q1689:
Virtual-circuit networks are designed to provide ______.
A. fast encryption
B. random routing
C. a logical path similar to physical circuits
D. coding structure
Correct Answer:
C
Chapter: 121
Q1690:
A virtual-circuit network is a cross between ______.
A. packet-switched and ring networks
B. circuit-switched and datagram networks
C. star and mesh networks
D. physical and logical networks
Correct Answer:
B
Chapter: 121
Q1691:
Which layer uses the virtual-circuit approach?
A. Network layer
B. Application layer
C. Datalink layer
D. Physical layer
Correct Answer:
C
Chapter: 121
Q1692:
Datagram switching is used at which layer of the OSI model?
A. Application layer
B. Transport layer
C. Network layer
D. Physical layer
Correct Answer:
C
Chapter: 121
Q1693:
In circuit-switching, the path is ______.
A. virtual and shared
B. shared with other users
C. dynamic and best-effort
D. physically dedicated
Correct Answer:
D
Chapter: 121
Q1694:
Which switching technique is most commonly used at the physical layer?
A. Datagram switching
B. Virtual-circuit switching
C. Circuit switching
D. Packet switching
Correct Answer:
C
Chapter: 121
Q1695:
Fill in the blank: In the OSI model, the ______ layer uses datagram switching.
A. Physical
B. Network
C. Datalink
D. Presentation
Correct Answer:
B
Chapter: 121
Q1696:
What type of path is used in circuit switching?
A. Fixed and physical
B. Variable and logical
C. Random and virtual
D. Dynamic and encrypted
Correct Answer:
A
Chapter: 121
Q1697:
Which of the following best describes the path in a datagram network?
A. Predefined
B. Dedicated
C. Varied for each packet
D. None of the above
Correct Answer:
C
Chapter: 121
Q1698:
The virtual-circuit approach is applied in the ______ layer.
A. Network layer
B. Transport layer
C. Datalink layer
D. Application layer
Correct Answer:
C
Chapter: 121
Q1699:
Which switching technique requires address lookup for every packet?
A. Virtual-circuit switching
B. Datagram switching
C. Circuit switching
D. TDM switching
Correct Answer:
B
Chapter: 121
Q1700:
In circuit switching, path establishment is done ______ data transmission.
A. after
B. during
C. before
D. randomly
Correct Answer:
C