单项选择题

What is the correct order of steps for upgrading a cisco wcs？（）

A.back up the database， stop the wcs， upgrade the wcs， restore the database， start the wcs
B.stop the wcs， back up the database， upgrade the wcs， restore the database， start the wcs
C.back up the database， stop the wcs， upgrade the wcs， start the wcs， restore the database
D.stop the wcs， back up the database， upgrade the wcs， start the wcs， restore the database

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单项选择题

When optimizing a standalone point-to-multipoint bridge installation with eight non-root bridges.
Which of the following rts threshold and cwmin settings would be correct for the non-root bridges？（）

A.rts threshold=4000，cwmin=3
B.rts threshold=1，cwmin=4
C.rts threshold=4000，cwmin=5
D.rts threshold=1，cwmin=5

单项选择题

Which command will enable dhcp debugging on a wlan controller？（）

A.debug dhcp enable
B.debug dhcp status enable
C.debug dhcp packet enable
D.enable debug dhcp packet

单项选择题

You are troubleshooting a one-way call problem with a cisco 7920 wireless ip phone on a standalone wlan.
What may cause 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.