单项选择题What is one reason that WPA encryption is preferred over WEP?()

A.A WPA key is longer and requires more special characters than the WEP key.
B.The access point and the client are manually configured with different WPA key values.
C.WPA key values remain the same until the client configuration is changed.
D.The values of WPA keys can change dynamically while the system is used.


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1.单项选择题A router learns about a remote network from EIGRP, OSPF, and a static route. Assuming all routing protocols are using their default administrative distance, which route will the router use to forward data to the remote network?()

A.The router will use the static route.
B.The router will use the OSPF route.
C.The router will use the EIGRP route.
D.The router will load balance and use all three routes.

4.多项选择题Which two practices help secure the configuration utilities on wireless access points from unauthorized access? (Choose two.)()

A.assigning a private IP address to the AP
B.changing the default SSID value
C.configuring a new administrator password
D.changing the mixed mode setting to single mode
E.configuring traffic filtering

5.单项选择题What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table?()

A.The switch will not forward unicast frames.
B.The switch will forward the frame to a specific port.
C.The switch will return a copy of the frame out the source port.
D.The switch will remove the destination MAC from the switch table.
E.The switch will forward the frame to all ports except the port on which it was received.

6.多项选择题Which of the following are key characteristics of PPP? (Choose three.)()

A.can be used over analog circuits
B.maps Layer 2 to Layer 3 address
C.encapsulates several routed protocols
D.supports IP only
E.provides error correction

7.多项选择题What TCP/IP stack configuration features can DHCP provide, in addition to assigning an IP address? (Choose three.)()

A.default gateway
B.DNS servers
C.FTP server
D.helper address
E.subnet mask
F.TFTP server

8.多项选择题What are two characteristics of Telnet? (Choose two.)()

A.It sends data in clear text format.
B.It is no longer supported on Cisco network devices.
C.It is more secure than SSH
D.It requires an enterprise license in order to be implemented.
E.It requires that the destination device be configured to support Telnet connections.

9.单项选择题Which of the following is true regarding the use of switches and hubs for network connectivity?()

A.Switches take less time to process frames than hubs take.
B.Switches do not forward broadcasts.
C.Hubs can filter frames.
D.Using hubs can increase the amount of bandwidth available to hosts.
E.Switches increase the number of collision domains in the network.

10.多项选择题Which statements are true about EIGRP successor routes? (Choose two.)()

A.A successor route is used by EIGRP to forward traffic to a destination.
B.Successor routes are saved in the topology table to be used if the primary route fails.
C.Successor routes are flagged as "active" in the routing table.
D.A successor route may be backed up by a feasible successor route.
E.Successor routes are stored in the neighbor table following the discovery process.

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Which cisco ios command can help to determine the timing of various debug events,relative to each other,when you are debugging a complicated router issue?()

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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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