單項選擇題What is one benefit of PVST+?()

A. PVST+reduces the CPU cycles for all the switches in the network
B. PVST+automatically selects the root bridge location,to provide optimized bandwidth usage.
C. PVST+allow the root switch location to be optimized per vlan.
D. PVST+supports Layer 3 load balancing without loops.


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1.單項選擇題Which item represents the standard IP ACL?()

A. access-list 50 deny 192.168.1.1 0.0.0.255
B. access-list 110 permit ip any any
C. access-list 2500 deny tcp any host 192.168.1.1 eq 22
D. access-list 101 deny tcp any host 192.168.1.1

2.單項選擇題Which statement about access lists that are applied to an interface is true?()

A. you can apply multiple access lists with the same protocol or in different direction.
B. you can config one access list,per direction,per layer 3 protocol
C. you can place as many access lists as you want on any interface
D. you can apply only one access list on any interface

3.單項選擇題Which command enables RSTP on a switch?()

A. spanning-tree mode rapid-pvst
B. spanning-tree uplinkfast
C. spanning-tree backbonefast
D. spanning-tree mode mst

4.單項選擇題DNS servers provide what service?()

A. they run a spell check on host names to ensure accurate routing
B. they map individual hosts to their specific IP address
C. they convert domain names into IP address
D. Given an IP address,they determine the name of the host that is…

5.單項選擇題There are no boot system commands in a router configuration in NVRAM.What is the fallback sequence that router will use to find an ios during reload?()

A. Flash,TFTP server,ROM
B. Flash,NVRAM,ROM
C. ROM,NVRAM,TFTP server
D. NVRAM,TFTP server,ROM
E. TFTP server,Flash,NVRAM

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At which layer of the OSI model dose PPP perform?()

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What is the result of issuing the frame-relay map ip 192.168.1.2 202 broadcast command?()

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Which command encrypts all plaintext passwords?()

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You have been asked to come up with a subnet mask that will allow all three web servers to be on the same network while providing the max number of subnets.Which network address and subnet mask meet this requirement?()

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After the show ip route command has been entered,the follwing routes are displayed.Which route will not be entered into the routing table of a neighboring router?()

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An employee of ABC company has move to an office on a different floor. Although the administrator is able to telnet to all of the routers,the address of Switch F is needed in order to verify that the employee remains in the same VLAN.Which action could be used by the administrator to find the IP address of Switch F?()

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When you are troubleshooting an ACL issue on a router,which command can help you to verify which interfaces are affected by the ACL?()

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Which statement describes the rule of split horizon?()

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A router receives information about network 192.168.10.0/24 from multiple sources.What will the router consider the most reliable information about the path to that network?()

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Which pairing reflects a correct protocol-and-metric relationship?()

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