模拟试题与答案

1、Cisco CCNP 842-813 examQuestion:1uses layer 3 switches in the Core of their network. Which method ofLayer 3switching uses a forwarding information base (FIB)A. Topology-based switchingB. Demand-based switchingC. Route cachingD. Flow-based switchingE. None of the other alternatives applyAnswer: AQues

2、tion:2You need to design the VLAN scheme for thenetwork. Which twostatements aretrue about best practices in VLAN design (Select two)A. Routing should occur at the access layer if voice VLANs are utilized.Otherwise, routingshould occur at the distribution layer.B. Routing should always be performed

3、at the distribution layer.C. VLANs should be localized to a switch.D. VLANs should be localized to a single switch unless voice VLANs arebeing utilized.E. Routing should not be performed between VLANs located on separateswitches.Answer: B, CQuestion:3If you needed to transport traffic coming from mu

4、ltiple VLANs(connected between switches),and your CTO was insistent on using an open standard, which protocolwould you useA.spanning-treeC.D. ISL E. VTP F.Answer: C Question:4Under what circumstances should an administrator prefer local VLANs over end-to-endVLANsA. Eighty percent of traffic on the n

5、etwork is destined for Internet sites.B. There are common sets of traffic filtering requirements forworkgroups located in multiplebuildings.C. Eighty percent of a workgroups traffic is to the workgroupslocal server.D. Users are grouped into VLANs independent of physical location.E. None of the other

6、 alternatives applyAnswer: AQuestion:5What are some virtues of implementing end-to-end VLANs (Choose two)A. End-to-end VLANs are easy to manage.B. Users are grouped into VLANs independent of a physical location.C. Each VLAN has a common set of security and resource requirementsfor all members.D. Res

7、ources are restricted to a single location.Answer: B, CQuestion:6Which of the following statements is true about the 80/20 rule (Select allthat apply)A. 20 percent of the traffic on a network segment should be localB. no more than 20 percent of the network traffic should be able to moveacross a back

8、bone.C. no more than 80 percent of the network traffic should be able to moveacross a backbone.D. 80 percent of the traffic on a network segment should be localAnswer: B, DQuestion:7TheLAN is becoming saturated with broadcasts and multicast traffic.What couldyou do to help a network with many multic

9、asts and broadcastsA. Creating smaller broadcast domains by implementing VLANs.B. Separate nodes into different hubs.C. Creating larger broadcast domains by implementing VLANs.D. Separate nodes into different switches.E. All of the above.Answer: AQuestion:8TheLAN switches are being configured to sup

10、port the use of DynamicVLANs.Which of the following are true of dynamic VLAN membership (Select allthat apply)A. VLAN membership of a user always remains the same even whenhe/she is moved toanother location.B. VLAN membership of a user always changes when he/she is moved toanother location.C. Member

11、ship can be static or dynamic.D. Membership can be static only.E. None of the other alternatives apply.Answer: A, CQuestion:9TheLAN switches are being configured to support the use of DynamicVLANs.What should be considered when implementing a dynamic VLANsolution (Select two)A. Each switch port is a

12、ssigned to a specific VLAN.B. Dynamic VLANs require a VLAN Membership Policy Server.C. Devices are in the same VLAN regardless of which port they attach to.D. Dynamic VLAN assignments are made through the command lineinterface.Answer: B, CQuestion:10In the three-layer hierarchical network design mod

13、el; whatwith the access layer(Select two)A. optimized transport structureB. high port density s associatedC. boundary definitionD. data encryptionE. local VLANsF. route summariesAnswer: B, EQuestion:11You are assigning VLANs to the ports of switch PG1. What VLAN numbervalue is anassigned to the defa

14、ult VLANA. VLAN 1003B. VLAN 1C. VLAN OND. VLAN AE. VLAN 0Answer: BQuestion:12The VLANs in switch PG1 are being modified. Which of the following areupdated in PG1every time a VLAN is modified (Select all that apply)A. Configuration revision numberB. Configuration revision flag fieldC. Configuration r

15、evision reset switchD. Configuration revision databaseE. None of the other alternatives apply.Answer: A, DQuestion:13What is a characteristic of assigning a static VLAN membershipA. VMPS server lookup is requiredB. Easy to configureC. Easy of adds, moves, and changesD. Based on MAC address of the co

16、nnected deviceAnswer: BQuestion:14Static VLANs are being used on thenetwork. What is true about staticVLANsA. Devices use DHCP to request their VLAN.B. Attached devices are unaware of any VLANs.C. Devices are assigned to VLANs based on their MAC addresses.D. Devices are in the same VLAN regardless o

17、f which port they attach to.Answer: BQuestion:15Twoswitches are connected via a trunk using VTP. Which VTPinformation doesa Catalyst switch advertise on its trunk ports when using VTP (Select two)A. STP root statusB. VTP modeC. Negotiation statusD. Management domainE. Configuration revision numberAn

18、swer: D, EQuestion:16You need to investigate a VTP problem between twoswitches. Thelack of whichtwo prevents VTP information from propagating between switches(Select two)A. A root VTP serverB. A trunk portC. VTP priorityD. VLAN 1E. None of the other alternatives applyAnswer: B, DQuestion:17PG1 and P

19、G2 are switches that communicate via VTP. What is the defaultVTPadvertisement intervals in Catalyst switches that are in server or clientmodeA. 30 secondsB. 5 minutesC. 1 minuteD. 10 secondsE. 5 secondsF. None of the other alternatives applyAnswer: BQuestion:18You want to configure switch PG1 to pro

20、pagate VLAN information acrossthenetwork using VTP. What must be configured on a Cisco switch in orderto advertise VLANinformationA. VTP modeB. VTP passwordC. VTP revision numberD. VTP pruningE. VTP domain nameF. None of the other alternatives applyAnswer: EQuestion:19Theswitches have all been upgra

21、ded to use VTP version 2. What aretwo benefitsprovided in VTP Version 2 that are not available in VTP Version 1 (Selecttwo)A. VTP version 2 supports Token Ring VLANsB. VTP version 2 allows VLAN consistency checksC. VTP version 2 allows active redundant links when used with spanningtreeD. VTP version

22、 2 reduces the amount of configuration necessaryE. VTP version 2 saves VLAN configuration memoryAnswer: A, BQuestion:20Thenetwork administrator needs to enable VTP pruning within thenetwork. What action should a network administrator take to enable VTPpruning on an entiremanagement domainA. Enable V

23、TP pruning on any switch in the management domainB. Enable VTP pruning on any client switch in the domainC. Enable VTP pruning on a VTP server in the management domainD. Enable VTP pruning on every switch in the domainE. None of the other alternatives applyAnswer: CQuestion:21VTP is configured on sw

24、itch PG1. Which of the following features wereadded in VTP version2 that were not previously supported in VTP version 1 (Select two)A. Supports Token Ring VLANs.B. Allows VLAN consistency checks.C. Saves VLAN configuration memory.D. Reduces the amount of configuration necessary.E. Allows active redu

25、ndant links when used with spanning tree.Answer: A, BQuestion:22Theswitches are configured to use VTP. What s true about the VLANtrunkingprotocol (VTP) (Select two)A. VTP messages will not be forwarded over nontrunk links.B. VTP domain names need to be identical. However, case doesn tmatter.C. A VTP

26、 enabled device which receives multiple advertisements willignore advertisementswith higher configuration revision numbers.D. A device in“ transparentmode”VTPwill not forward VTPmessages.E. VTP pruning allows switches to prune VLANs that do not have anyactive ports associatedwith them.Answer: A, DQu

27、estion:23Switch PG1 and PG2 both belong to theVTP domain. Whats trueabout theswitch operation in VTP domains (Select all that apply)A. A switch can only reside in one management domainB. A switch is listening to VTP advertisements from their own domainonlyC. A switch is listening to VTP advertisemen

28、ts from multi domainsD. A switch can reside in one or more domainsE. VTP is no longer supported on Catalyst switchesAnswer: A, BQuestion:24VTP devices in a network track the VTP revision number. What is a VTPconfigurationrevision numberA. A number for identifying changes to the network switch.B. A n

29、umber for identifying changes to the network router.C. A number for identifying changes to the network topology.D. None of the other alternatives apply.Answer: CQuestion:25Switch PG1 is configured to use the VLAN Trunking Protocol (VTP). Whatdoes PG1advertise in its VTP domainA. The VLAN ID of all k

30、nown VLANs, the management domain name, andthe total number oftrunk links on the switch.B. The VLAN ID of all known VLANs, a 1-bit canonical format (CF1Indicator), and the switchconfiguration revision number.C. The management domain name, the switch configuration revisionnumber, the knownVLANs, and

31、their specific parameters.D. A 2-byte TPID with a fixed value of 0 x8100 for the managementdomain number, theswitch configuration revision number, the known VLANs, and theirspecific parameters.E. None of the other alternatives apply.Answer: CQuestion:26VTP switches use advertisements to exchange inf

32、ormation with eachother. Which of thefollowing advertisement types are associated with VTP (Select all thatapply)A. Domain advertisementsB. Advertisement requests from clientsC. Subset advertisementsD. Summary advertisementsAnswer: B, C, DQuestion:27Switch PG1 is part of theVTP domain. Whats true of

33、 VTP Pruningwithin thisdomain (Select all that apply)A. It does not prune traffic from VLANs that are pruning-ineligibleB. VLAN 1 is always pruning-eligibleC. it will prune traffic from VLANs that are pruning-ineligibleD. VLAN 2 is always pruning-ineligibleE. None of the other alternatives apply.Ans

34、wer: AQuestion:28What action should you execute if you wanted to enable VTP pruning onyour entiremanagement domainA. Enable VTP pruning on any client switch in the management domain.B. Enable VTP pruning on any switch in the management domain.C. Enable VTP pruning on every switch in the management d

35、omain.D. Enable VTP pruning on a VTP server in the management domain.E. Disable VTP pruning on a VTP server in the management domain.Answer: DQuestion:29Switch PG1 is configured with VTP. Which two VTP modes will make PG1capable of creatingand deleting VLANs on itself (Select two)ClientServerTranspa

36、rentPass-throughNo-negotiate Answer: B, CQuestion:30When the Catalyst switch PG1 is enabled to use VTP, which informationdoes it advertise onits trunk ports (Select two)A. VTP modeB. STP root statusC. Negotiation statusD. Management domainE. Configuration revision numberAnswer: D, EQuestion:31Twoswi

37、tches are connected via a trunk link. In this network, theoriginal frame isencapsulated and an additional header is added before the frame iscarried over a trunk link.At the receiving end, the header is removed and the frame is forwardedto the assigned VLAN.This describes which technologyDISLISLDTPI

38、EEEMPLSNone of the other alternatives applyAnswer: BQuestion:32Thecore switches usetrunks to connect to each other. How doestrunking keep track of multiple VLANsA. It tags the data frame with VLAN information and recalculates the CRCvalueB. It encapsulates the data frame with a new header and frame

39、checksequenceC. It modifies the port index of a data frame to indicate the VLAND. It adds a new header containing the VLAN ID to the data frameE. None of the other alternatives applyAnswer: AQuestion:33The coreswitches are configured to usetrunks. Which threestatementsare correct with regard to the

40、IEEEstandard (Select three)A. The IEEEframe format adds a 4 byte field to a Ethernet frameB. The packet is encapsulated with a 26 byte header and a 4 byte FCSC. The protocol uses point-to-multipoint connectivityD. The protocol uses point-to-point connectivityE. The IEEE frame uses multicast destinat

41、ion of 0 x01-00-0c-00-00 F. The IEEE frame retains the original MAC destination address Answer: A, D, FQuestion:34Switch PG1 has been configured with DTP using the desirable option.Which statementdescribes Dynamic Trunking Protocol (DTP) desirable modeA. The interface actively attempts to convert th

42、e link to a trunk link.B. The interface is put into permanent trunking mode but preventedfrom generating DTPframes.C. The interface is put into permanent trunking mode and negotiates toconvert the link into atrunk link.D. The interface is put into a passive mode, waiting to convert the link toa trun

43、k link.E. None of the other alternatives applyAnswer: AQuestion:35You need to configure a newswitch for trunking. Which switchcommand enablesa trunking protocol that appends a four byte CRC to the packetSwitch(config-if)#switchport trunk encapsulation dot1qSwitch(config-if)#switchport trunk encapsul

44、ation itefSwitch(config-if)#switchport trunk encapsulation fddiSwitch(config-if)#switchport trunk encapsulation islNone of the other alternatives applyAnswer: DQuestion:36While using a packet analyzer, you notice four additional bytes beingadded to the packets inthenetwork. Which protocol inserts a

45、four byte tag into the Ethernetframe andrecalculates CRC valueDTPVTPISLNone of the other alternatives apply Answer: CQuestion:37You need to configure a newswitch to support DTP. Which DTPswitchport modeparameter sets the switch port to actively send and respond to DTPnegotiation framesAccessNo negot

46、iateTrunkDynamic desirableDynamic autoF. None of the other alternatives applyAnswer: DQuestion:38A newswitch was just configured using the“switchport trunk nativevlan 7”command. What does this interface command accomplishA. Causes the interface to apply ISL framing for traffic on VLAN 7B. Configures

47、 the trunking interface to forward traffic from VLAN 7C. Configures the interface to be a trunking port and causes traffic onVLAN 7 to betaggedD. Configures the trunking interface to send traffic from VLAN 7untaggedE. None of the other alternatives applyAnswer: DQuestion:39You need to connect twocor

48、e switches via an ISL trunk. Whichstatement is trueregarding the configuration of ISL trunksA. A Catalyst switch cannot have ISL and IEEEtrunks enabled.B. All Catalyst switches support ISL trunking.C. A Catalyst switch will report giants if one side is configured for ISLwhile the other side isnot.D.

49、 ISL trunking requires that native VLANs match.E. None of the other alternatives applyAnswer: CQuestion:40Which of the following technologies would an Internet Service Provideruse to supportov erlapping customer VLAN ID s over transparent LAN servicestunnelingATMSDHIP Over Optical NetworkingISLAnswe

50、r: AQuestion:41If you were to configure an ISL Ethernet trunk between two Ciscoswitches, named PG1 andPG2, what would you have to include at the end of the link for the trunkto operate correctly(Select two)A. An identical VTP mode.B. An identical speed/duplex.C. An identical trunk negotiation parameter.D. An identical trunk encapsulation parameter.Question:42Refer