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

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　　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 #

　　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.

　　B. Configure each Frame Relay circuit as a point-to-point line to support multicast #

　　and broadcast traffic.

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　　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

　　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

　　router on the network. #

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

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　　a subnet. #

　　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 a change in the #

　　network topology.

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

　　A. flooding B. broadcasting C. convergence D. summarization

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　　8.Which of the following must be determined first by the router in order to #

　　route the data?

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　　A. the distance metric of the data

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　　B. the source address of the data

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　　C. which routing protocol is used by the data #

　　D. whether the protocol suite of the data is active

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　　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

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　　contained in this summarization. What would your reply be?

　　A. 1 B. 2 C. 4 D. 8 E. 16 #