51CTO下载-CCNA作业1.doc

1. PDUs at the Network layer of the OSI are called what?A. TransportB. FramesC. PacketsD. Segments2. Which two statements about a reliable connection-oriented data transfer are true?A. Receiving hosts acknowledge receipt of data.B. When buffers are full, packets are discarded and are not retransmitted.C. Windowing is used to provide flow control and unacknowledged data segments.D. If the transmitting hosts timer expires before receipt of an acknowledgment, the transmittinghost drops the virtual circuit.3. PDUs at the Data Link layer are named what?A. TransportB. FramesC. PacketsD. Segments4. Segmentation of a data stream happens at which layer of the OSI model?A. PhysicalB. Data LinkC. NetworkD. Transport5. You want to install a Wireless network in your corporate office, and need good speed but notmore then about 250 feet of range. Which of the following wireless technologies should youinstall?A. NarrowbandB. Narrowband PCSC. Broadband PCSD. InfraredE. Spread Spectrum6. Which layer of the OSI provides translation of data?A. ApplicationB. PresentationC. SessionD. TransportE. Data Link7. When data is encapsulated, which is the correct order?A. Data, frame, packet, segment, bitB. Segment, data, packet, frame, bitC. Data, segment, packet, frame, bitD. Data, segment, frame, packet, bit8. Which of the following is not an advantage of a layered model?A. Allows multiple-vendor development through standardization of network componentsB. Allows various types of network hardware and software to communicateC. Allows changes to occur in all layers without having to change just one layerD. Prevents changes in one layer from affecting other layers, so it does not hamperdevelopment9. What are two purposes for segmentation with a bridge?A. Add more broadcast domains.B. Create more collision domains.C. Add more bandwidth for users.D. Allow more broadcasts for users.10. What does the term “Base” indicate in 100BaseTX?A. The maximum distanceB. The type of wiring usedC. A LAN switch method using half duplexD. A signaling method for communication on the network11. What is the maximum distance of 100BaseT?A. 100 feetB. 1000 feetC. 100 metersD. 1000 meters12. Which of the following would describe a Transport layer connection that would ensure reliabledelivery?A. RoutingB. AcknowledgmentsC. SwitchingD. System authentication13. What are two reasons to segment a network with a bridge?A. Increase the amount of collision on a segment.B. Decrease the amount of broadcast on a segment.C. Reduce collisions within a broadcast domain.D. Increase the number of collision domains.14. Which of the following types of connections can use full duplex? (Choose three options.)A. Hub to hubB. Switch to switchC. Host to hostD. Switch to hubE. Switch to host15. Which of the following are Presentation layer protocols? (Choose three options.)A. TFTPB. IPC. RTFD. QuickTimeE. MIDI16. Which of the following are considered some reasons for LAN congestion? (Choose three options.)A. Bill GatesB. Low bandwidthC. Too many users in a broadcast domainD. Broadcast stormsE. RoutersF. MulticastingG. Any Cisco competitor17. Which of the following are reasons for breaking up a network into two segments with a router?(Choose two.)A. To create fewer broadcast domainsB. To create more broadcast domainsC. To create one large broadcast domainD. To stop one segments broadcasts from being sent to the second segment18. How do you connect to a router using HyperTerminal?A. Connect the Ethernet port of your host to the Ethernet interface of the router using arolled cable.B. Connect the COM port of your host to the Ethernet port of your router using a straightthroughcable.C. Connect the Ethernet port of your host to the console port of the router using a rolled cable.D. Connect the COM port of your host to the console port of the router using a crossover cable.E. Connect the COM port of your host to the console port of the router using a rolled cable.19. You want to use full-duplex Ethernet instead of half duplex. Which two of the following will bebenefits on your network?A. You will have more collision domains.B. Youll have no collisions on each segment.C. It should be faster.D. It will be less expensive.20. What is a