1. What is OSI model ? Junior A. the OSI layer that frames bits, adds MAC addressing, and handles node-to-node delivery on a link B. the OSI layer that establishes, manages, and terminates dialogues between two applications C. a 7-layer reference model: Physical, Data Link, Network, Transport, Session, Presentation, Application D. a 4-layer practical model: Link, Internet, Transport, and Application used by the real Internet
2. Which term means: "a 7-layer reference model: Physical, Data Link, Network, Transport, Session, Presentation, Application"? Junior A. OSI model B. decapsulation C. encapsulation D. segment
3. Which statement is correct? Junior A. OSI model — the OSI layer that handles data translation, encryption, and compression formats for the application B. OSI model — the OSI layer that transmits raw bits over a medium and defines cables, voltages, and connectors C. OSI model — a 7-layer reference model: Physical, Data Link, Network, Transport, Session, Presentation, Application D. OSI model — the process where each layer wraps the upper layer's data with its own header as it moves down the stack
4. What is Physical layer ? Junior A. the OSI layer that establishes, manages, and terminates dialogues between two applications B. the protocol data unit of the transport layer, produced by TCP or UDP C. the OSI layer that transmits raw bits over a medium and defines cables, voltages, and connectors D. a 4-layer practical model: Link, Internet, Transport, and Application used by the real Internet
5. Which term means: "the OSI layer that transmits raw bits over a medium and defines cables, voltages, and connectors"? Junior A. multiplexing B. OSI model C. Physical layer D. segment
6. Which statement is correct? Junior A. Physical layer — the OSI layer that establishes, manages, and terminates dialogues between two applications B. Physical layer — combining data from several upper-layer sources into one lower-layer stream, demultiplexed by port at the receiver C. Physical layer — the OSI layer that transmits raw bits over a medium and defines cables, voltages, and connectors D. Physical layer — a 4-layer practical model: Link, Internet, Transport, and Application used by the real Internet
7. What is Data Link layer ? Junior A. the process where each layer wraps the upper layer's data with its own header as it moves down the stack B. the OSI layer that frames bits, adds MAC addressing, and handles node-to-node delivery on a link C. the named unit of data at each layer: bits, frame, packet, segment, and message D. combining data from several upper-layer sources into one lower-layer stream, demultiplexed by port at the receiver
8. Which term means: "the OSI layer that frames bits, adds MAC addressing, and handles node-to-node delivery on a link"? Junior A. Physical layer B. OSI model C. Network layer D. Data Link layer
9. Which statement is correct? Junior A. Data Link layer — the OSI layer that frames bits, adds MAC addressing, and handles node-to-node delivery on a link B. Data Link layer — the OSI layer that handles logical addressing and routing of packets across multiple networks C. Data Link layer — the named unit of data at each layer: bits, frame, packet, segment, and message D. Data Link layer — a 7-layer reference model: Physical, Data Link, Network, Transport, Session, Presentation, Application
10. What is Network layer ? Junior A. the OSI layer that provides end-to-end delivery, segmentation, and optional reliability between processes B. the OSI layer that handles logical addressing and routing of packets across multiple networks C. the protocol data unit of the transport layer, produced by TCP or UDP D. the process where each layer wraps the upper layer's data with its own header as it moves down the stack
11. Which term means: "the OSI layer that handles logical addressing and routing of packets across multiple networks"? Junior A. multiplexing B. Data Link layer C. Network layer D. protocol data unit (PDU)
12. Which statement is correct? Junior A. Network layer — the OSI layer that handles logical addressing and routing of packets across multiple networks B. Network layer — the OSI layer closest to the user that provides network services like HTTP, FTP, and DNS C. Network layer — the named unit of data at each layer: bits, frame, packet, segment, and message D. Network layer — the protocol data unit of the transport layer, produced by TCP or UDP
13. What is Transport layer ? Junior A. the OSI layer that provides end-to-end delivery, segmentation, and optional reliability between processes B. the named unit of data at each layer: bits, frame, packet, segment, and message C. a 4-layer practical model: Link, Internet, Transport, and Application used by the real Internet D. the process where each layer strips its header and passes the payload up as data moves toward the application
14. Which term means: "the OSI layer that provides end-to-end delivery, segmentation, and optional reliability between processes"? Junior A. Transport layer B. encapsulation C. Presentation layer D. multiplexing
15. Which statement is correct? Junior A. Transport layer — the OSI layer that provides end-to-end delivery, segmentation, and optional reliability between processes B. Transport layer — the OSI layer that transmits raw bits over a medium and defines cables, voltages, and connectors C. Transport layer — the protocol data unit of the data link layer, carrying MAC source and destination addresses D. Transport layer — the OSI layer that handles logical addressing and routing of packets across multiple networks
16. What is Session layer ? Junior A. the process where each layer strips its header and passes the payload up as data moves toward the application B. the OSI layer that transmits raw bits over a medium and defines cables, voltages, and connectors C. the OSI layer that establishes, manages, and terminates dialogues between two applications D. the OSI layer that frames bits, adds MAC addressing, and handles node-to-node delivery on a link
17. Which term means: "the OSI layer that establishes, manages, and terminates dialogues between two applications"? Junior A. encapsulation B. Session layer C. TCP/IP model D. multiplexing
18. Which statement is correct? Junior A. Session layer — combining data from several upper-layer sources into one lower-layer stream, demultiplexed by port at the receiver B. Session layer — the OSI layer that transmits raw bits over a medium and defines cables, voltages, and connectors C. Session layer — a 7-layer reference model: Physical, Data Link, Network, Transport, Session, Presentation, Application D. Session layer — the OSI layer that establishes, manages, and terminates dialogues between two applications
19. What is Presentation layer ? Junior A. the OSI layer that frames bits, adds MAC addressing, and handles node-to-node delivery on a link B. the process where each layer wraps the upper layer's data with its own header as it moves down the stack C. the OSI layer that handles data translation, encryption, and compression formats for the application D. the protocol data unit of the data link layer, carrying MAC source and destination addresses
20. Which term means: "the OSI layer that handles data translation, encryption, and compression formats for the application"? Junior A. OSI model B. Application layer C. Presentation layer D. segment
21. Which statement is correct? Junior A. Presentation layer — a 7-layer reference model: Physical, Data Link, Network, Transport, Session, Presentation, Application B. Presentation layer — the OSI layer that handles data translation, encryption, and compression formats for the application C. Presentation layer — the OSI layer closest to the user that provides network services like HTTP, FTP, and DNS D. Presentation layer — the process where each layer wraps the upper layer's data with its own header as it moves down the stack
22. What is Application layer ? Junior A. the OSI layer closest to the user that provides network services like HTTP, FTP, and DNS B. the OSI layer that provides end-to-end delivery, segmentation, and optional reliability between processes C. the protocol data unit of the data link layer, carrying MAC source and destination addresses D. the process where each layer wraps the upper layer's data with its own header as it moves down the stack
23. Which term means: "the OSI layer closest to the user that provides network services like HTTP, FTP, and DNS"? Junior A. OSI model B. Physical layer C. multiplexing D. Application layer
24. Which statement is correct? Junior A. Application layer — the process where each layer strips its header and passes the payload up as data moves toward the application B. Application layer — a 4-layer practical model: Link, Internet, Transport, and Application used by the real Internet C. Application layer — the OSI layer that handles data translation, encryption, and compression formats for the application D. Application layer — the OSI layer closest to the user that provides network services like HTTP, FTP, and DNS
25. What is TCP/IP model ? Mid A. a 4-layer practical model: Link, Internet, Transport, and Application used by the real Internet B. the OSI layer that transmits raw bits over a medium and defines cables, voltages, and connectors C. the protocol data unit of the transport layer, produced by TCP or UDP D. a 7-layer reference model: Physical, Data Link, Network, Transport, Session, Presentation, Application
26. Which term means: "a 4-layer practical model: Link, Internet, Transport, and Application used by the real Internet"? Mid A. encapsulation B. segment C. protocol data unit (PDU) D. TCP/IP model
27. Which statement is correct? Mid A. TCP/IP model — a 4-layer practical model: Link, Internet, Transport, and Application used by the real Internet B. TCP/IP model — the named unit of data at each layer: bits, frame, packet, segment, and message C. TCP/IP model — the OSI layer that handles data translation, encryption, and compression formats for the application D. TCP/IP model — the process where each layer wraps the upper layer's data with its own header as it moves down the stack
28. What is encapsulation ? Mid A. the OSI layer that provides end-to-end delivery, segmentation, and optional reliability between processes B. the process where each layer wraps the upper layer's data with its own header as it moves down the stack C. the OSI layer that frames bits, adds MAC addressing, and handles node-to-node delivery on a link D. the protocol data unit of the transport layer, produced by TCP or UDP
29. Which term means: "the process where each layer wraps the upper layer's data with its own header as it moves down the stack"? Mid A. Session layer B. Physical layer C. segment D. encapsulation
30. Which statement is correct? Mid A. encapsulation — the process where each layer wraps the upper layer's data with its own header as it moves down the stack B. encapsulation — the OSI layer that establishes, manages, and terminates dialogues between two applications C. encapsulation — the OSI layer that transmits raw bits over a medium and defines cables, voltages, and connectors D. encapsulation — a 4-layer practical model: Link, Internet, Transport, and Application used by the real Internet
Showing 30 of 45 CN · OSI & TCP-IP questions — the full set, with answers, explanations and an AI tutor on every question, is inside.