This set of Multiple Choice Questions (MCQs) covers the OSI Model in Computer Networks, including layers, functions, communication modes, and networking devices. These questions are highly useful for IBPS IT Officer, GATE, and other competitive exams.
Topic: Computer Networks – OSI Model | Set: 1
Difficulty: Easy to Medium
Total Questions: 15
New to Computer Networks?
Before attempting the OSI Model questions, it is recommended to understand the basics of network structures. Learn Computer Network Topology MCQs (Set 1) to build a strong foundation.
OSI Model MCQ
Q1. In OSI network architecture, the routing is performed by the:
A. Network layer
B. Data link layer
C. Transport layer
D. Session layer
View Answer & Explanation
Answer: A
Explanation: The Network layer is responsible for determining routing paths and forwarding packets across networks.
Q2. In OSI network architecture, dialogue control and token management are responsibilities of the:
A. Session layer
B. Network layer
C. Transport layer
D. Data link layer
View Answer & Explanation
Answer: A
Explanation: The Session layer manages communication sessions including synchronization and token management.
Q3. Which OSI layer is more closely related to physical communication facilities?
A. Application
B. Session
C. Network
D. Data link
View Answer & Explanation
Answer: D
Explanation: The Data Link layer handles frame transmission over the physical medium.
Q4. The physical layer in the OSI model defines the:
A. Characteristics of electrical signals
B. Error detection logic
C. Routing paths
D. End-to-end connectivity
View Answer & Explanation
Answer: A
Explanation: The Physical layer defines signal transmission characteristics like voltage, timing, and encoding.
Q5. Which layer defines the user’s interface to the network?
A. Network layer
B. Data link layer
C. Application layer
D. Session layer
View Answer & Explanation
Answer: C
Explanation: The Application layer provides direct interaction with end users and applications.
Q6. The term ‘duplex’ refers to:
A. Simultaneous send and receive
B. Cannot communicate simultaneously
C. One-way communication
D. Only transmission
View Answer & Explanation
Answer: A
Explanation: Duplex refers to bidirectional communication, especially full duplex allows simultaneous transmission.
Q7. Which communication mode supports simultaneous bidirectional data transfer?
A. Simplex
B. Half-duplex
C. Full-duplex
D. Multiplex
View Answer & Explanation
Answer: C
Explanation: Full-duplex allows communication in both directions at the same time.
Q8. Conversion of parallel data into bit streams is done by:
A. Application layer
B. Network layer
C. Data link layer
D. Session layer
View Answer & Explanation
Answer: C
Explanation: Data Link layer frames data and converts it into a bit stream for transmission.
Q9. Modulation is the process of:
A. File transfer
B. Converting digital to analog signals
C. Analog to digital
D. Echoing signals
View Answer & Explanation
Answer: B
Explanation: Modulation converts digital signals into analog form for transmission over communication media.
Q10. UTP stands for:
A. Unshielded Twisted-Pair
B. Ubiquitous Teflon Port
C. Uniform Terminating Port
D. Unshielded Connector
View Answer & Explanation
Answer: A
Explanation: UTP is widely used in Ethernet cabling without shielding.
Q11. Which device converts digital signals for telephone transmission?
A. Interface
B. Interpreter
C. Modem
D. I/O port
View Answer & Explanation
Answer: C
Explanation: A modem modulates and demodulates signals for communication over phone lines.
Q12. A bridge uses which address?
A. Physical address
B. Network address
C. SAP address
D. All
View Answer & Explanation
Answer: A
Explanation: Bridges operate at Data Link layer and use MAC (physical) addresses.
Q13. Which protocol maps IP to MAC address?
A. DNS
B. ARP
C. Reverse lookup
D. IP mapping
View Answer & Explanation
Answer: B
Explanation: ARP resolves IP addresses into MAC addresses.
Q14. A device combining multiple signals into one is:
A. Concentrator
B. Modifier
C. Multiplexer
D. Duplex line
View Answer & Explanation
Answer: C
Explanation: Multiplexers combine multiple signals into a single transmission channel.
Q15. Gateway connects:
A. Similar protocols
B. Dissimilar protocols
C. Same network devices
D. Local devices
View Answer & Explanation
Answer: B
Explanation: Gateways translate between different protocols and architectures.
Conclusion
This set covers fundamental OSI Model concepts including layers, communication types, and networking devices. Mastering these questions will help you build a strong foundation for Computer Networks in IBPS IT Officer and GATE exams.
For detailed theory and understanding of the concepts, refer to OSI Model Computer Networks