网络工程计算机网络原理参考复习题四有答案Word格式.docx

1、 （Select all valid answers） BCA. TCPB. TelnetC. FTPD. ARPE. IPF. None of the above4 Which three of the protocols below belong to the application layer? （Select three answer choices） BCEA. ARPB. HTTPSC. SMTPD. CDPE. TFTPF. ICMP5 In which Spanning-Tree states does a switch port learn MAC addresses? （S

2、electtwo）CDA. BlockingB. ListeningC. ForwardingD. LearningE. Relaying6 Which OSI layer is associated with the following: The acknowledgement of transmissions, sequencing, and flow control across a network? （choose one） CA. Layer 2B. Layer 3C. Layer 4D. Layer 5E. Layer 6F. Layer 77 Refer to the graph

3、ic. Two 2950 switches connect through ports Fa0/24 and astraight-through cable. Based on the output of the show cdp neighbor commandfrom both switches and the information given, what can be concluded?A. Port Fa/24 on each switch must be configured in VLAN 1 in order for the switches tosee neighbor i

4、nformation.B. Port Fa0/24 on each switch must be configured as a trunk port in order for neighborinformation to be received.C. The switches are not cabled properly.D. An IP address needs to be assigned to both switches.E. VTP is incorrectly configured on switch TK1.8 Which of the protocols below, op

5、erates at Layer 2 of the OSI model, and is used to maintain a loop-free network?（choose one） BA. RIPB. STPC. IGRPE. VTP9 You have set up an Internet based FTP server, where people can upload and download files. In terms of the OSI model, what is the highest layer used during the FTP sessions. AA. Ap

6、plicationB. PresentationC. SessionD. TransportE. InternetF. Data LinkG. Physical10 Four TestKing switches are connected together as shown in the diagram below:Study the Exhibit carefully. What is the purpose of the Spanning Tree Protocol thatis operating in the exhibited switch topology?BA. To elect

7、 a particular switch as backup designated switch.B. To have one active Layer 2 path through the switches network.C. To select the best path to a remote destination that is on a different network.D. To learn the MAC addresses of host attached to the switches network.E. To distribute VLAN configuratio

8、n information throughout the switched network.11 Which OSI layer header contains the address of a destination host that is another network? EA. applicationB. presentationC. sessionD. transportE. networkF. data linkG. physical12 In the communications industry, what are the features and benefits of us

9、ing the layered OSI model? （Select the two best answers） ADA. It encourages industry standardization by defining what functions occur at each layer of the model.B. It necessitates changes in functionality in one layer to other layers.C. It enables equipment efficiency from different vendors to use t

10、he same electronic components.D. It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting.E. It supports the evolution of multiple competing standards, and thus enhances business equipment manufacturing opportuni

11、ties.13 Which of the statements below are true regarding the availability of bandwidth on a network? （Select all that apply.）CDA. Bandwidth availability is decreasing.B. Bandwidth availability is infinite.C. Bandwidth is used when analyzing network performance.D. Bandwidth availability is finite.E.

12、Bandwidth availability is fixed.14 Which one of the following is the most commonly used layer 2 network device? CA. HubB. BridgeC. SwitchD. RouterE. Repeaters15. A Corporation offices network topology is shown in the diagram below:16 Host PC1 needs to communications with the e-mail server shown abov

13、e.What address will be placed on the destination address field of the frame when it leaves host PC1? A. The MAC address of PC1B. The MAC address of switch Switch1C. The MAC address of the fa0/0 interface of the router.D. The MAC address of the Eth1/0 interface of the router.E. The MAC address of swi

14、tch TestKing2F. The MAC address of the email server17. Which of the following layers of the TCP/IP model most closely corresponds to the network layer of the OSI model? BB. InternetC. TransportD. NetworkE. Data Link18You have an Ethernet network. Which of the conditions below can lead to increasedco

15、ngestion on your network? （Select two answer choices）DFA. The use of Full-Duplex Mode.B. The Creation on New Collision Domains.C. The Creation on New Broadcast Domains.D. The Addition of Hubs to the Network.E. The use of switches in the Network.F. The Amount of ARP or IPX SAP Traffic.19 What is the

16、purpose of the spanning-tree algorithm in a switched LAN?CA. To provide a monitoring mechanism for networks in switched environments.B. To manage VLANs across multiple switches.C. To prevent switching loops in networks with redundant switched paths.D. To segment a network into multiple collision dom

17、ains.E. To prevent routing loops in networks.20 A Corporation LAN is displayed in the diagram below:21 Host B sends a frame to host C. What will the switch do with the frame?A. Drop the frameB. Send the frame out all ports except port 0/9C. Return the frame to host BD. Send an ARP request for host C

18、E. Send an ICMP Host Unreachable message to Host BF. Record the destination MAC address in the switching table and send the frame directly to Host C22. The Corporation LAN consists of 6 switches connected together as shown in the diagram below:23 What is the name of the potential problem of this swi

19、tch setup, and what protocolcan prevents its occurrence. （Select only one answer choice） FA. routing loops, hold down timersB. switching loops, split horizonC. routing loops, split horizonD. switching loops, VTPE. routing loops, STPF. switching loops, STP24 You have been contracted by TestKing to re

20、place the network cabling of theirLANs. The System Administrator gives you specific instructions that he needs touse cabling in the LAN that is NOT susceptible to EMI.What kind of cable would you use to satisfy the administrators needs?EA. Thicknet coaxial cable.B. Thinnet coaxial cable.C. Category

21、5 UTP cable.D. Category 5 STP cable.E. Fiber optic cable.F. All of the above25 . Which two of the following values does STP take into consideration when it elects the root bridge? （Select two answer choices） CEA. The BPDU version numberB. The access layer bridge settingC. The Bridge IDD. The spannin

22、g-tree update numberE. The bridge priorityF. The VLAN number26. Which one of the following actions would actually increase congestion on an Ethernet network?A. Increasing the number of collision domains.B. Micro-segmenting the network.C. Adding hubs for connectivity to the network.D. Putting additio

23、nal switches in the network.E. Implementing VLANs in the network.27 What is the IEEE standard associated with Gigabit Ethernet? （Select two answerchoices）CEA. 802.11B. 802.5C. 802.3abD. 802.3aeE. 802.3zF. 802.3u28. In a switched LAN network, what is the Spanning-Tree algorithm used for?A. It is used

24、 to provide a mechanism for routing updates in switched environments.B. It is used to prevent routing loops in networks with redundant routes.C. It is used to prevent switching loops in networks with redundant switched routes.D. It is used to manage, the addition, deletion, and naming of VLANs acros

25、s multiple switches.E. It is used to segment a network into multiple collision domains.F. None of the above.G. All of the above are functions of STP.29. On a half-duplex Ethernet LAN, two hosts attempt to send data simultaneously, resulting in a collision. Following this collision, what will the hos

26、ts do? （Select all valid answers） CA. The destination host sends a request to the source for retransmission.B. The hosts will attempt to resume transmission after a time delay has expired.C. The hosts will do nothing, as the higher layers are responsible for data error correction and re-transmission

27、.30. Why is full-duplex Ethernet superior to its single-duplex counterpart? （Select two answer choices.） BDA. It uses inexpensive hubsB. It operates without collisionsC. It operates on switchesD. It provides faster data transferE. It utilizes fewer wiring pairs31 Which of the following statements co

28、rrectly describe the differences betweenhalf-duplex and full-duplex Ethernet? （Select two answer choices.）BDA. Full-duplex Ethernet uses CSMA/CD to prevent collisions.B. Half-duplex Ethernet uses a loopback circuit to detect collisions.C. A full-duplex Ethernet card allows 20Mbps for data transmission.D. Full-duplex Ethernet makes use of two pairs of wires for data.E. An Ethernet hub can operate both half and full duplex simultaneously.32. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet? （Select two answer choices