CCNA第二学期练习答案chapter1

1、1窗体顶端Which two statements correctly describe the components of a router? (Choose two.) RAM permanently stores the configuration file used during the boot sequence. ROM contains diagnostics executed on hardware modules. NVRAM stores a backup copy of the IOS used during the boot sequence. Flash memory does not lose its contents during a reboot. ROM contains the most current and most complete version of the IOS. Flash contains boot system commands to identify the location of the IOS. 窗体底端2窗体顶端Which

2、 interfaces in the exhibit could be used for a leased line WAN connection? (Choose two.) 1 2 3 4 5 6 窗体底端3窗体顶端If a router cannot find a valid configuration file during the startup sequence, what will occur? The startup sequence will reset. The router will prompt the user for a response to enter setup mode. The startup sequence will halt until a valid configuration file is acquired. The router will generate a default configuration file based on the last valid configuration. The router will monito

3、r local traffic to determine routing protocol configuration requirements. 窗体底端4窗体顶端Which of the following is the correct flow of routines for a router startup? load bootstrap, load IOS, apply configuration load bootstrap, apply configuration, load IOS load IOS, load bootstrap, apply configuration, check hardware check hardware, apply configuration, load bootstrap, load IOS 窗体底端5窗体顶端What is the default sequence for loading the configuration file? NVRAM, FLASH, ROM FLASH, TFTP,CONSOLE NVRAM, TFTP,

4、 CONSOLE FLASH, TFTP, ROM 窗体底端6窗体顶端From what location can a router load the Cisco IOS during the boot process? (Choose two.) RAM TFTP server NVRAM setup routine Flash memory terminal 窗体底端7窗体顶端Which are functions of a router? (Choose three.) packet switching extension of network segments segmentation of broadcast domains selection of best path based on logical addressing selection of best path based on physical addressing 窗体底端8窗体顶端What three processes does a router execute when it receives a pack

5、et from one network that is destined for another network? (Choose three.) decapsulates the Layer 3 packet by stripping off the Layer 2 frame header uses the destination MAC Address in the IP Header to look up the next-hop address in the routing table leaves the Layer 2 frame header intact when decapsulating the Layer 3 packet uses the destination IP Address in the IP header to look up the next-hop address in the routing table encapsulates the Layer 3 packet into the new Layer 2 frame and forward

6、s it out the exit interface encapsulates the Layer 3 packet into a special Layer 1 frame and forwards it to the exit interface 窗体底端9窗体顶端The network administrator needs to connect two routers directly via their FastEthernet ports. What cable should the network administrator use? straight-through rollover cross-over serial 窗体底端10窗体顶端Refer to the exhibit. What can be concluded from the output of the running-configuration of a router? The passwords are encrypted. The current configuration was saved

7、to NVRAM. The configuration that is shown will be the one used on the next reboot. The commands that are displayed determine the current operation of the router. 窗体底端11窗体顶端Which two statements describe characteristics of load balancing? (Choose two.) Load balancing occurs when a router sends the same packet to different destination networks. Load balancing occurs when the same number of packets are sent over static and dynamic routes. Load balancing allows a router to forward packets over multip

8、le paths to the same destination network. Unequal cost load balancing is supported by EIGRP. If multiple paths with different metrics to a destinations exist, the router cannot support load balancing. 窗体底端12窗体顶端Refer to the exhibit. What can be concluded from the routing table output in the exhibit? (Choose two.) This router only has two interfaces. The router interfaces are not operational yet. This router is configured to forward packets to remote networks. The FastEthernet0/0 and Serial0/0/0

9、interfaces of this router were configured with an IP address and the no shutdown command. An IP packet received by this router with a destination address of 198.18.9.1 will be forwarded out of the Serial0/0/0 interface. 窗体底端13窗体顶端The serial connection shown in the graphic needs to be configured. Which configuration commands must be made on the Sydney router to establish connectivity with the Melbourne site? (Choose three.) Sydney(config-if)# ip address 201.100.53.2 255.255.255.0 Sydney(config-if)# no shutdown Sydney(config-if)# ip address 201.100.53.1 255.255.255.224 Sydney(config-if)# clock rate 56000 Sydney(config-

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