A.dBm: characterizing the absolute value of power

B.dB: characterizing the relative value of power

C.If A antenna is 12dBi and B antenna is 14dBi, it can be said that A is 2dBi smaller than B.

D.dBi and dBd: characterizing the relative value of the gain

A.True

B.False

A.The standby AC should always be in the power-on state.

B.In the process of establishing an active/standby link between the AP and the active and standby ACs, the link established first must be the primary link.

C.Dual-link backup technology improves network reliability and ensures business stability in important nodes of the network.

D.The network service configuration on the active and standby ACs must be consistent.

A.Three-layer roaming

B.Four-layer roaming

C.two-layer roaming

D.Seamless AP roaming

A.The web authentication is triggered by the user's http packet before the IP address is successfully obtained. At this time, the user is forced to redirect to the portal server to perform the authentication process.

B.WPA only supports one encryption technology of TKIP

C.WPA2 uses 802.1X authentication

D.When the user obtains the IP address successfully, the user triggers the HTTP packet of the user. At this time, the user is forced to redirect to the portal server to perform the authentication process.