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1. At which of the following layers of the Open Systems Interconnection (OSI) model do the protocols on a typical local area network (LAN) use media access control (MAC) addresses to identify other computers on the network? A. Physical B. Data link C. Network D. Transport 2. Which of t...

1. At which of the following layers of the Open Systems Interconnection (OSI) model do the protocols on a typical local area network (LAN) use media access control (MAC) addresses to identify other computers on the network? A. Physical B. Data link C. Network D. Transport 2. Which of the following organizations developed the Open Systems Interconnection (OSI) model? A. International Telecommunication Union (ITU-T) B. Comité Consultatif International Télégraphique et Téléphonique (CCITT) C. American National Standards Institute (ANSI) D. Institute of Electrical and Electronics Engineers (IEEE) E. International Organization for Standardization (ISO) 3. Which layer of the Open Systems Interconnection (OSI) model is responsible for the logical addressing of end systems and the routing of datagrams on a network? A. Physical B. Data link  C. Network D. Transport E. Session F. Presentation G. Application 4. On a TCP/IP network, which layers of the Open Systems Interconnection (OSI) model contain protocols that are responsible for encapsulating the data generated by an application, creating the payload for a packet that will be transmitted over a network? (Choose all that apply.) A. Physical B. Data link C. Network D. Transport E. Session F. Presentation G. Application 5. Which layer of the Open Systems Interconnection (OSI) model is responsible for translating and formatting information? A. Physical B. Data link C. Network D. Transport E. Session  F. Presentation G. Application 6. Which of the following devices typically operates at the Network layer of the Open Systems Interconnection (OSI) model? A. Proxy server B. Network interface adapter C. Hub D. Router 7. Which layer of the Open Systems Interconnection (OSI) model provides an entrance point to the protocol stack for applications? A. Physical B. Data link C. Network D. Transport E. Session F. Presentation G. Application 8. Which layer of the Open Systems Interconnection (OSI) model is responsible for dialogue control between two communicating end systems? A. Physical B. Data link C. Network D. Transport  E. Session F. Presentation G. Application 9. Some switches can perform functions associated with two layers of the Open Systems Interconnection (OSI) model. Which two of the following layers are often associated with network switching? (Choose all that apply.) A. Physical B. Data link C. Network D. Transport E. Session F. Presentation G. Application 10. At which layer of the Open Systems Interconnection (OSI) model are there TCP/IP protocols that can provide either connectionless or connection-oriented services to applications? A. Physical B. Data link C. Network D. Transport E. Session F. Presentation G. Application 11. Which of the following layers of the Open Systems Interconnection (OSI) model typically have dedicated physical hardware devices associated with them? (Choose all that apply.) A. Physical B. Data link C. Network D. Transport E. Session F. Presentation G. Application 12. At which layer of the Open Systems Interconnection (OSI) model is there a protocol that adds both a header and a footer to the information that is passed down from an upper layer, thus creating a frame? A. Physical B. Data link C. Network D. Transport E. Session F. Presentation G. Application 13. Identify the layer of the Open Systems Interconnection (OSI) model that controls the addressing, transmission, and reception of  Ethernet frames, and also identify the media access control method that Ethernet uses. A. Physical layer: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) B. Physical layer: Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) C. Data link layer: CSMA/CD D. Data link layer: CSMA/CA 14. At which layer of the OSI model do you find the protocol responsible for the delivery of data to its ultimate destination on an internetwork? A. Data link B. Network C. Session D. Application 15. Which of the following is not a protocol operating at the Network layer of the OSI model? A. IP B. ICMP C. IGMP D. IMAP 16. Ed is a software developer who has been given the task of creating an application that requires guaranteed delivery of information between end systems. At which layer of the Open  Systems Interconnection (OSI) model does the protocol that provides the guaranteed delivery run, and what type of protocol must Ed use? A. Data link layer; connectionless B. Network layer; connection-oriented C. Transport layer; connection-oriented D. Application layer; connectionless 17. Alice is a network administrator designing a new local area network (LAN). She needs to determine the type of cabling and the network topology to implement. Which layers of the Open Systems Interconnection (OSI) model apply to cabling and topology elements? A. Physical and Data link layers B. Data link and Network layers C. Network and Transport layers D. Transport and Application layers 18. Which layers of the Open Systems Interconnection (OSI) model do not have protocols in the TCP/IP suite exclusively dedicated to them? (Choose all that apply.) A. Physical B. Data link C. Network D. Transport E. Session  F. Presentation G. Application 19. The protocols at which layer of the Open Systems Interconnection (OSI) model use port numbers to identify the applications that are the source and the destination of the data in the packets? A. Application B. Presentation C. Transport D. Network 20. Which of the following is a correct listing of the Open Systems Interconnection (OSI) model layers, in order, from top to bottom? A. Physical, Data link, Transport, Network, Session, Presentation, Application B. Application, Session, Presentation, Transport, Network, Data link, physical C. Presentation, Application, Transport, Session, Network, Physical, Data link D. Session, Application, Presentation, Transport, Data link, Network, Physical E. Application, Presentation, Session, Transport, Network, Data link, Physical 21. At which of the Open Systems Interconnection (OSI) model layers do switches and bridges perform their basic functions? A. Physical  B. Data link C. Network D. Transport 22. On a TCP/IP network, flow control is a function implemented in protocols operating at which layer of the Open Systems Interconnection (OSI) model? A. Presentation B. Session C. Transport D. Network 23. Which layer of the Open Systems Interconnection (OSI) model defines the medium, network interfaces, connecting hardware, and signaling methods used on a network? A. Physical B. Data link C. Network D. Transport E. Session F. Presentation G. Application 24. Which of the OSI model layers is responsible for syntax translation and compression or encryption? A. Data link B. Network  C. Session D. Presentation E. Application 25. Which layer of the Open Systems Interconnection (OSI) model is responsible for transmitting signals over the network medium? A. Physical B. Data link C. Network D. Transport E. Session F. Presentation G. Application 26. Specify the layer of the Open Systems Interconnection (OSI) model at which the Internet Protocol (IP) operates and whether it is connection-oriented or connectionless. A. Network; connection-oriented B. Network; connectionless C. Transport; connection-oriented D. Transport; connectionless 27. An Ethernet network interface adapter provides functions that span which two layers of the Open Systems Interconnection (OSI) model? A. Physical and Data link B. Data link and Network  C. Network and Transport D. Transport and Application 28. Which of the following protocols operate at the Application layer of the Open Systems Interconnection (OSI) model? (Choose all that apply.) A. HTTP B. SNMP C. ICMP D. IGMP E. UDP 29. Which layer of the Open Systems Interconnection (OSI) model would be responsible for converting a text file encoded using EBCDIC on the sending system into ASCII code, when required by the receiving system? A. Application B. Presentation C. Session D. Physical 30. Which of the following protocols operates at the Network layer of the OSI model but does not encapsulate data generated by an upper layer protocol for transmission over the network? A. IP B. UDP C. ARP  D. ICMP E. TCP 31. Which of the following devices run exclusively at the Physical layer of the Open Systems Interconnection (OSI) model? (Choose all that apply.) A. Routers B. Repeaters C. Hubs D. Switches 32. Which of the following devices enables two computers to communicate when they are using different protocols at each layer of the Open Systems Interconnection (OSI) reference model? A. A router B. A hub C. A switch D. A gateway