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| 作者:不明 来源:www.pccode.net 整理 发布时间:2007-1-24 15:24:27 发布人:wongrs | |||
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CCNA 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.) A. SMTP 2.One of the trainees assigned to you want to know which services use TCP. What can you tell him? (Select three options.) A. DHCP 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 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 assigned to the subinterface. 5.With regard to ISDN, which of the following are true? (Choose all that apply.) A. Legacy DDR can use port information to define interesting traffic. CCNP - BSCI 6.Which of the following is a characteristic of link-state protocols? A. A network topology change generates an update that is broadcast to every router on
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