CCNACCNPCCIE模拟试题Word下载.docx

1、 a. /38 b. /30 c. /27 d. /23 e. /18 4.how would you configure a router to avoid situations such as split horizon issues hampering routing updates on a frame relay work?a. configure a separate sub-interface for each pvc with a unique dlci and sub assigned to the subinterface. b. configure each frame

2、relay circuit as a point-to-point line to support multicast and broadcast traffic. c. configure one sub-interface to disperse into multiple pvc connections to multiple remote router interfaces. d. configure as many as possible sub-interfaces on the same sub. 5.with regard to isdn, which of the follo

3、wing are true? （choose all that apply.） a. legacy ddr can use port information to define interesting traffic. b. legacy ddr can configure multiple dialer configurations on the same interface. c. legacy ddr can use acls to define interesting traffic. d. hdlc or ppp can be used to encapsulate isdn d c

4、hannel information. e. the bri interfaces on isdn routers with dialer profiles configured cannot belong to multiple dialer pools. f. dialer profiles cannot use acls to define interesting traffic. 6.which of the following is a characteristic of link-state protocols?a. a work topology change generates

5、 an update that is broadcast to every router on the work. b. the periodic routing update interval is slightly different in each router on a sub. c. each router creates a routing table that only includes its directly connected neighbors. d. link-state protocols send routing updates only when there is

6、 a change in the work topology. 7.what is the term associated with synchronizing the routing tables after a topology change ours?a. flooding b. broadcasting c. convergence d. summarization 8.which of the following must be determined first by the router in order to route the data?a. the distance metr

7、ic of the data b. the source address of the data c. which routing protocol is used by the data d. whether the protocol suite of the data is active 9.you are a technician at abc. abc has the sub/mask of 172.29.100.0/26 set aside for small remote locations. each location will have 5 ip devices connect

8、ed to the work. which vlsm mask will provide the minimum number of hosts you require?a. /27 b. /28 c. /29 d. /30 e. /31 10.you are a trainee technician at abc. your instructor shows you the following route summarization entry: 192.168.134.0/22 your instructor wants to know how many class c addresses

9、 are contained in this summarization. what would your reply be?a. 1 b. 2 c. 4 d. 8 e. 16 11.which mand enables an etherchannel bundle on a catalyst 2900xl switch?a. port group b. set port channel on c. port etherchannel enable d. set etherchannel port enable 12.which two statements about dynamic vla

10、ns are true? （choose two） a. each switch port is assigned 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 assignment are made through the mand interface. 13.which statement is corre

11、ct about 802.1q trunking? （select all that apply） a. both switches must be in the same vtp domain. b. the encapsulation type of both ends of the trunk does not have to match. c. the native vlan on both ends of the trunk must be vlan 1. d. 802.1q trunking can only be configured on a layer 2 port. e.

12、in 802.1q trunking, all vlan packets are tagged on the trunk link, except the native vlan. 14.you need to take advantage of fastether ports. which two actions avoid configuration problems that cause the port to be automatically disabled?a. allow some ports in a channel to be disabled. b. configure t

13、he ports in a channel as dynamic vlan ports. c. configure all ports in a channel to operate at the same speed and duplex mode. d. assign all ports in a channel to the same vlan or configure them as trunk ports. 15.what is the cause of jitter?a. variable queue delays b. packet drops c. transmitting t

14、oo many small packets d. pression 16.regarding dhcp, dhcp relay and dhcp server are mutually exclusive. a. none of the choices. b. true c. false only for certain ios version d. false e. false only for ios version below v10 17.a lapd address field can be 1 or 2 bytes long. a. true b. false c. true on

15、ly in the us d. true only in asia e. true only in europe 18.which of the following are valid functions of the lock dte modem attribute （choose all that apply）?a. disable uart. b. enable uart. c. locks the data speed between the puter motherboard and the rs232 port. d. locks the data speed between th

16、e modem and the dte device. 19.which of the following are not the valid types of atm addresses （choose all that apply）?a. d b. gct c. bsp d. icd e. nsap f. aed 20.which of the following are not the valid types of x.25 plp packet fields （choose all that apply）?a. user data b. lci c. gfi d. pti e. non

17、e of the choices. 21.you are a technician at abc. your newly appointed abc trainee wants to know what the similarities between topology diagrams and work configuration tables are. what would your reply be?a. both share few ponents. b. both share many of the same ponents. c. both define physical memo

18、ry ponents. d. both are used for troubleshooting. e. both use lines and symbols to represent work ponents. 22.you are a technician at abc. your newly appointed abc trainee wants to know what the default action for the output of debug and system error messages is. what would your reply be?a. output g

19、oes to the remote console if logging is off. b. output is sent to the console terminal. c. error logging automatically invokes debug output to the designated tftp server. d. output configuration requires a tftp server to write files e. output is written to a syslog server. 23.you are the work admini

20、strator at abc. abc has a switched work. you want to control the designation of the spanning-tree root bridge in the abc work. what should you do?a. by enabling uplink-fast on the ports of the desired switch. b. by lowering the bridge priority on the desired switch. c. by setting a lower mac address

21、 on the designated switch. d. by raising the bridge id on one switch. 24.you are a technician at abc. you receive a report from several abc users who plain that they get slow responses when sending and receiving email, especially when browsing the inter. you investigate the plaint by checking the ou

22、tput of a ping mand issued from her puter and find that it indicates intermitted suess and failures messages, when attempting to contact the email server. a tracert to the corporate inter gateway router shows high latency and oasional time out messages. what would be the most effective troubleshooti

23、ng approach if you are to determine the cause of the slow response time?a. bottom-up approach b. random aess approach c. divide and conquer approach d. top-down approach e. top-down rule-out approach 25.you are a technician at abc. your newly appointed abc trainee wants to know what features make os

24、pf more suitable than rp in large work installations. what would your reply be?a. diffusing update algorithm b. no hop count limitation c. higher routing update overhead d. faster convergence e. lower routing update overhead 26.you are the work administrator at abc. you are troubleshooting a work pr

25、oblem. you want to trace the route to a unix workstation that you want to reach through the inter. however, traceroute does not work. currently, there is an inbound aess-list applied to the serial interface on router 1. an entry in the aess-list states aess-list 101 permit tcp any any. what aess-lis

26、t entry may you need to be added to the aess-list in order to get traceroute to work?a. aess-list 101 permit udp any any b. aess-list 101 permit icmp any any time-exceeded aess-list 101 permit icmp any any port-unreachable c. aess-list 101 permit icmp any any time-exceeded aess-list 101 permit icmp

27、any any -unreachable d. aess-list 101 permit icmp any any echo aess-list 101 permit icmp any any -unreachable e. aess-list 101 permit udp any any aess-list 101 permit icmp any any protocol-unreachable 27.what does the bgp backdoor mand do?a. it changes the distance of an ibgp route to 20. b. it chan

28、ges the distance of an ebgp route to 200. c. it changes the distance of an igp route to 20. d. it does not effect any changes in distance of the route. e. it changes the distance of an igrp route to 200. 28.which of the following dns resource records is not valid?a. ns b. ptr c. mx d. fqdn e. a 29.w

29、hich of the following features is provided by rip v2 that were previously not possible with rip v1?a. classless routing and split-horizon. b. poison reverse and updating to multicast addresses. c. poison reverse and classless routing. d. classless routing and updating to multicast addresses. e. rout

30、e tag and classless routing. 30.which of the following statements is valid when taking custom queuing into aount?a. custom queuing has the ability to restrict a particular type of traffic to a given bandwidth not matter what is load is like on that link. b. custom queuing looks at groups of packets from the similar source-destination pairs. c. custom queuing will not proceed to a next queue unless the current queue is empty. d. custom queuing can prevent one type of traffic from dominating a busy link. 模板,内容仅供参考