1. Which layer of the OSI model is responsible for multiplexing upper-layer applications, session establishment, and tearing-down of virtual circuits? Presentation Layer Network Layer Data Link Layer Transport Layer 2. Which layer of the OSI model handles the transmission and reception of frames, error detection and correction, and uses frame headers for these purposes? Physical Layer Network Layer Data Link Layer Presentation Layer 3. Which layer of the OSI model handles access to shared media, such as Token passing or Ethernet? Data Link Layer Network Layer Logical Link Control (LLC) sub-layer Media Access Control (MAC) sub-layer 4. The function of the Logical Link Control (LLC) sub-layer in the Data Link Layer is to: Transmit and receive frames Handle access to shared media Handle error control and flow control Establish communication sessions 5. The Network Layer is responsible for: Maintaining communication sessions Transmitting and receiving frames Sending packets between source and destination networks Error detection and correction 6. Which layer of the OSI model handles the establishment, maintenance, and termination of communication sessions between systems? Physical Layer Session Layer Network Layer Data Link Layer 7. Routers operate at which layer of the OSI model? Network Layer Transport Layer Session Layer Data Link Layer 8. The primary responsibility of the Presentation Layer is: Data compression, decompression, encryption, and decryption Transmitting and receiving frames Multiplexing upper-layer applications Routing packets through the Internet 9. Which layer of the OSI model handles the interface between the DTE and DCE, as well as bit synchronization? Presentation Layer Data Link Layer Transport Layer Physical Layer 10. Which of the following are responsibilities of the Transport Layer in the OSI model? (Select all that apply.) Establishing communication sessions Ensuring data integrity Multiplexing upper-layer applications Transmitting and receiving frames Coordinating communication between systems 11. The OSI model is divided into how many layers? 4 5 7 6 12. Which layer of the OSI model is responsible for handling data compression, encryption, and decryption? Presentation Layer Transport Layer Network Layer Data Link Layer 13. The primary responsibility of the Presentation Layer is to: Establish communication sessions Present data in standard formats Route packets through the network Manage physical connections 14. The Media Access Control (MAC) sub-layer handles: Error control and flow control Routing packets through the Internet Transmission and reception of frames Access to shared media, such as Token passing or Ethernet 15. What is the purpose of the OSI model in networking? To manage the physical connections in a network To define computer networking protocols To handle error control and flow control To determine the physical interfaces of devices 16. Which layer of the OSI model is responsible for sending packets from the source network to the destination network using predetermined methods? Transport Layer Data Link Layer Network Layer Physical Layer 17. Which layer is responsible for identifying and establishing the availability of intended communication partners and verifying sufficient resources exist for communication? Network Layer Transport Layer Application Layer Presentation Layer 18. IP Security (IPSec) is an example of which layer of the OSI model? Physical Layer Transport Layer Network Layer Session Layer 19. The Transport Layer is responsible for maintaining end-to-end communications to ensure: Encryption and decryption Multiplexing upper-layer applications Flow control Transmitting and receiving frames 20. What is the function of the Network Layer in the OSI model? Coordinating communication between systems Multiplexing upper-layer applications Transmitting and receiving frames Handling data compression and decompression Loading … Question 1 of 20
