Users have been complaining that their...

单项选择题 Users have been complaining that their Frame Relay connection to the corporate site is very slow. The network administrator suspects that the link is overloaded. Based on the partial output of the Router# show frame relay pvc command shown in the graphic, which output value indicates to the local router that traffic sent to the corporate site is experiencing congestion?（）

A. DLCI = 100
B. last time PVC status changed 00:25:40
C. in BECN packets 192
D. in FECN packets 147
E. in DE packets 0

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A. 131.1.123.30
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C. 131.1.123.32
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2.单项选择题All WAN links inside the ABC University network use PPP with CHAP for authentication security. Which command will display the CHAP authentication process as it occur between two routers in the network?（）

A. show chap authentication
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D. debug chap authentication
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3.单项选择题A network administrator is troubleshooing an EIGRP problem on a router and needs to confirm the IP addresses of the devices with which the router has established adjacency. The retransmit interval and the queue counts for the adjacent routers also need to be checked. What command will display the required information?（）

A. Router# show ip eigrp adjacency
B. Router# show ip eigrp topology
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4.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.
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D. The values of WPA keys can change dynamically while the system is used.

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5.单项选择题Which additional configuration step is necessary in order to connect to an access point that has SSID broadcasting disabled?（）

A. Set the SSID value in the client software to public.
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C. Set the SSID value on the client to the SSID configured on the AP.
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6.单项选择题You have finished physically installing an access point on the ceiling at your office. At a minimum, which paramenter must be configured on the access point in order to allow a wireless client to operate on it?（）

A. AES
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C. SSID
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7.单项选择题A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remote server. What is the highest layer of the protocol stack that the nework administrator is using for this operation?（）

A. application
B. presentation
C. session
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8.单项选择题Acknowldgement, Sequencing, and Flow control are characteristics of which OSI layer?（）

A. Layer 2
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9.单项选择题The administrator is unable to establish connectivity between two Cisco routers. Upon reviewing the command output of both routers, what is the most likely caust of the problem?（）

A. Authentication needs to be changed to PAP for both routers.
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10.单项选择题What is valid reason for a switch to deny port access to new devices when port security is enabled?（）

A. The denied MAC addresses have already been learned or confgured on another secure interface in the same VLAN.
B. The denied MAC address are statically configured on the port.
C. The minimum MAC threshold has been reached.
D. The absolute aging times for the denied MAC addresses have expired.

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