單項選擇題Router A is unable to reach Router B.Both routers are running ios version 12.0.After reviewing the command output and graphic,what is the most likely cause of the problem?()

A. incorrect bandwidt h configuration
B. incorrect LMI configuration
C. incorrect map statement
D. incorrect IP address


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1.單項選擇題Which command enables IPv6 forwarding on a cisco router?()

A. ipv6 host
B. ipv6 unicast-routing
C. ipv6 local
D. ipv6 neighbor

2.單項選擇題In the implementation of VLSM techniques on a network using a single Class C IP address,which subnet mask is the most efficient for point-to-point serial links?()

A. 255.255.255.240
B. 255.255.255.254
C. 255.255.255.252
D. 255.255.255.0
E. 255.255.255.248

3.單項選擇題Which IPv6 address is valid?()

A. 2031:0:130F::9C0:876A:130B
B. 2001:0DB8:0000:130F:0000:0000:08GC:140B
C. 2001:0DB8:0:130H::87C:140B
D. 2031::130F::9C0:876A:130B

4.單項選擇題Which of the following protocols uses both TCP and UDP ports?()

A. SMTP
B. Telnet
C. FTP
D. DNS

5.單項選擇題Which command enhances the 802.1D convergence time on ports that are connected to hosts?()

A. spanning-tree backbonefast
B. spanning-tree uplinkfast
C. spanning-tree portfast
D. spanning-tree cost512

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An administrator must assign static IP addresses to the servers in a network.For network 192.168.20.24/29, the router is assigned the first usable host address while the sales server is given the last usable host address. Which of the following should be entered into the IP propertied box for the sales server?()

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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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What is the subnetwork address for a host with the IP address 201.100.5.68/28?()

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Which Cisco IOS diagnostics command can disrupt the operation of a router under high-load conditions?()

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How are VTP advertisements delivered to switches across the network?()

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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 command displays the CHAP authentication process as it occurs between two routers?()

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Which IPsec security protocol should be used when confidentiality is required?()

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Which command is used to display the collection of OSPF link states?()

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Which protocol reduces administrative overhead in a switched network by allowing the configuration of a new VLAN to be distributed to all the switches in a domain?()

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