In WLAN networking, which of the following backup technologies has the lowest cost and the slowest switching speed?

• A.VRRP dual-machine hot standby
• B.Dual-link cold backup
• C.Dual-link hot backup
• D.N+1 backup

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Which of the following reasons may cause hosts in the same VLAN on the LAN to be unable to communicate with each other? (Multiple choice)

• A.Port isolation is configured on the switch
• B.Wrong port and MAC address binding are configured on the switch
• C.The interface is artificially shut down or physically damaged
• D.Switch MAC address learning error

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Which of the following are the advantages of using stacking and clustering technology to build a campus network? (Multiple choice)

• A.Simplifies network management and reduces the complexity of network deployment planning
• B.Improved network equipment and link utilization
• C.Can effectively reduce network power consumption
• D.Business interruption time is greatly reduced

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Which of the following descriptions about configuring the dual-machine hot backup function in the WLAN network is wrong?

• A.When configuring dual-link hot backup, after the active AC completes the service configuration, execute the commit command to send the configuration to the AP, and then complete the configuration of the standby AC
• B.When configuring dual-link backup, you need to use the commit command on the active AC to send the configuration to the AP after the active and standby ACs have completed the service configuration.
• C.When dual-link hot backup is switched over, due to the long switching time, the business data forwarded by the tunnel will be interrupted during this period, and new users will not be able to go online, and the online users will not be able to roam.

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By default, when IS-IS is configured on a device, the minimum time it takes to sense a neighbor failure is seconds. However, after being associated with BFD, BFD can replace the Hello mechanism of the IS-IS protocol, thereby reducing the time it takes to sense a neighbor failure to as little as seconds.
Millisecond level.

• A.FALSE
• B.TRUE

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