You are troubleshooting a problem with a cisco 7920 wireless ip phone on a standalone wlan. the phone rings but， when you Answer ，the call is dropped. What may have caused this problem？（）

A . The minimum data rate is not set to 11 Mbps. B . An address resolution protocol has been disabled. C . Publicly Secure Packet forwarding is enabled. D . The access point is set to the least congested channel.

A . Each router has an identical link state database. B . External routes are imported into a separate link state database. C . Syn chronization of link state databases is maintained via floodingo f LSAs. D . Information in the link state database is used to build a routing table by calculating a shortest-path tree. E . By default,link state databases are refreshede very 10 minutes in the absence of topology changes.

A . ping 192.168.1.255 B . ping with sweep option C . ping 192.168.1.127 D . ping 192.168.1.64 E . ping with broadcast optio

A . IEEE 802.10 B . Misconfigured NIC C . User configuration D . IEEE 802.1Q E . None of the other alternatives apply

A . runts B . FCS errors C . interface resets D . late collisio

A . The minimum data rate is not set to 11 Mbps. B . An address resolution protocol is enabled. C . Publicly Secure Packet forwarding is enabled. D . The access point is set to the least congested channel.

A . show ip access-list B . show access-list C . list ip interface D . show interface E . show ip interface

A . Publicly Secure Packet forwarding is enabled. B . The minimum data rate is not set to 11 Mbps. C . An address resolution protocol is enabled. D . The access point is set to the least congested channel.

A . The minimum data rate is not set to 11 Mbps. B . An address resolution protocol has been disabled C . Publicly Secure Packet forwarding is enabled D . The access point is set to the least congested channel.

A . The minimum data rate is not set to 11 Mbps. B . Publicly Secure Packet forwarding is enabled. C . The access point is set to the least congested channel. D . An address resolution protocol has been disabled.

A . Some query or reply packets are lost between the routers B . The neighboring router starts receiving route updates from this router C . A failure causes traffic on a link between two neighboring routers to flow in only one direction（unidirectional link） D . The neighboring router stops receiving ACK packets from this router

A . ping B . tracert C . ipconfig D . show ip route E . winipcfg F . show interfaces G . All of the above

A . NetFlow can discover the protocols in use and automatically adjust QoS traffic classes to meet policy-map requirements. B . NetFlow records can be used to understand traffic profiles per class of service for data, voice, and video traffic. C . NetFlow can be configured to identify voice and video traffic flows and place them into a low-latency queue for expedited processing. D . NetFlow can report on the number of traffic matches for each class map in a configured QoS policy configuration.

A . Are the ASBRs trying to redistribute the external routes into a totally stubby area? B . Are the ABRs configured with stubby areas? C . Is the subnets keyword being used with the redistribution command? D . Is backbone area (area 0) contiguous? E . Is the CPU utilization of the routers high?

A . The minimum data rate is not set to 11 Mbps. B . An address resolution protocol is enabled. C . Publicly Secure Packet forwarding is enabled. D . The access point is set to the least congested channel.

A . Each router has an identical link state database B . External routes are imported into a separate link state database C . Synchronization of link state databases is maintained via flooding of LSAs D . Information in the link state database is used to build a routing table by calculating a shortest-path tree E . By default， link state databases are refreshed every 10 minutes in the absence of topologychange

A . show ip route B . ipconfig C . tracert D . show interfaces E . traceroute F . ping G . All of the above

A . the minimum data rate is not set to 11 mbps. B . an address resolution protocol has been disabled C . publicly secure packet forwarding is enabled D . the access point is set to the least congested channel.

A . The network is load balancing among different members of the VRRP group B . The default hello timers are 1 second C . The interface IP address is being used as the virtual IP address D . There are several routers in the group simultaneously forwarding traffic for the group E . It is a Cisco Proprietary protocol F . The default hello timers are 3 second

A . the minimum data rate is not set to 11 mbps. B . publicly secure packet forwarding is enabled. C . the access point is set to the least congested channel. D . an address resolution protocol has been disabled.

A . Some quer y or reply packets are lost between the routers. B . The neighboring router starts receiving route updates from this router. C . A failure causes traffic on a link between two neighboring routers to flow in only one direction(unidirectional link). D . Th e neighboring router stops receiving ACK packets from this router.

A . runts B . FCS errors C . interface resets D . late collisio

At which OSI layer is this problem associated with？ A．The data link layer B．The application layer C．The access layer D．The session layer E．The network layer

A. Pause the Task Scheduler service. B. Delete the scheduled backup job. Re-create the backup after you finish troubleshooting. C. Modify the properties of the scheduled backup job and clear the Enabled check box. D. Run the ntbackup /p command on the server.