CCNA、CCNP、CCIE模拟试题(一)

　　CCNA、CCNP、CCIE模拟试题(一)

　　1.Which of the following types of packets will be allowed entry when a serial #

　　interface’s inbound access list has been configured to prohibit entry for TCP and #

　　UDP ports 21, 23 and 25? (Select three options.)

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　　A. SMTP B. STP C. FTP D. Telnet E. HTTP F. POP3 #

　　2.One of the trainees assigned to you want to know which services use TCP. W

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　　hat can you tell him? (Select three options.) #

　　A. DHCP B. SMTP C. SNMP D. FTP E. HTTPF. TFTP #

　　3.Which of the following network masks would you use to reduce any wastage of #

　　IP addresses in point-to- point WAN links on a network that supports VLSM? #

　　A. /38 B. /30 C. /27 D. /23 E. /18

　　4.How would you configure a router to avoid situations such as split horizon

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　　issues hampering routing updates on a Frame Relay network? #

　　A. Configure a separate sub-interface for each PVC with a unique DLCI and subnet

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　　assigned to the subinterface.

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　　B. Configure each Frame 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 subnet.

　　5.With regard to ISDN, which of the following are true? (Choose all that apply.)

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　　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 channel 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. #

　　- BSCI

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　　6.Which of the following is a characteristic of link-state protocols?

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　　A. A network topology change generates an update that is broadcast to every

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　　router on the network.

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　　B. The periodic routing update interval is slightly different in each router on #

　　a subnet. #

　　C. Each router creates a routing table that only includes its directly connected

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　　neighbors. #

　　D. Link-state protocols send routing updates only when there is a change in the #

　　network topology. #

　　7.What is the term associated with synchronizing the routing tables after a topology change occurs? #

　　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 metric of the data

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　　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 subnet/mask of 172.29.100.0/26 set #

　　aside for small remote locations. Each location will have 5 IP devices connected to #

　　the network. 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 are

　　contained in this summarization. What would your reply be?

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　　A. 1 B. 2 C. 4 D. 8 E. 16