CompTIA Network Practice Questions PDF

1.1 Explain concepts related to the Open Systems Interconnection (OSI) reference model. 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 compute...

1.1 Explain concepts related to the Open Systems Interconnection (OSI) reference model. 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 1.2 Compare and contrast networking appliances, applications, and functions. 33. Which of the following best describes the function of a firewall? A. A device located between two networks that enables administrators to restrict incoming and outgoing traffic  B. A device that connects two networks together, forwarding traffic between them as needed C. A device that enables Internet network clients with private IP addresses to access the Internet D. A device that caches Internet data for subsequent use by internal network clients 34. Which of the following terms is used to describe the method by which a firewall examines the port numbers in Transport layer protocol headers? A. IP address filtering B. Service-dependent filtering C. Deep packet inspection (DPI) D. Next-generation firewall (NGFW) 35. Which of the following physical network devices can conceivably be implemented as software in a computer's operating system? (Choose all that apply.) A. Hub B. Switch C. Router D. Firewall 36. Which of the following criteria does a firewall capable of service- dependent filtering use to block traffic? A. Hardware addresses B. Protocol identifiers  C. IP addresses D. Port numbers 37. Ralph is a freelance network consultant installing a three-node small business network. The computers are all in the same room and use wired Ethernet to connect to the switched ports of a multifunction device. The device also functions as a network address translation (NAT) router for a cable modem connection to the Internet. NAT provides a measure of security, but Ralph wants to be sure that the network is protected from unauthorized Internet traffic and attacks against open ports. Which of the following solutions would enable Ralph to accomplish this goal with the minimum cost to the client? A. Install a hardware firewall between the multifunction device and the cable modem. B. Install an intrusion prevention system (IPS) between the multifunction device and the cable modem. C. Install a personal firewall on each of the computers. D. Connect an intrusion detection system (IDS) to one of the switched ports in the multifunction device. E. Use a port scanner to monitor the traffic entering the open ports on the computers. 38. Which of the following statements about hubs and switches are true? (Choose all that apply.)  A. Hubs operate only at the Physical layer, whereas switches operate only at the Network layer. B. All of the devices connected to a hub are part of a single collision domain, whereas each device connected to a switch has its own collision domain. C. There are switches available with Network layer functionality, but there are no hubs with that capability. D. Switches create a separate broadcast domain for each connected device, whereas hubs create a single broadcast domain for all of the connected devices. 39. Which of the following devices perform essentially the same function? (Choose two.) A. Hubs B. Bridges C. Switches D. Routers 40. Which of the following switch types immediately forwards frames after looking at only the destination address? A. Cut-through B. Source route C. Store-and-forward D. Destination 41. Which of the following is something that only a firewall capable of stateful packet inspection can do?