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

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

C.dBm: characterizing the absolute value of power

D.dB: characterizing the relative value of power

A.6 and 11

B.3 and 8

C.4 and 8

D.4 and 10

A.WAPI is China's wireless LAN national standard system

B.WPA2 uses 802.1X authentication

C.WPA2 PSK authentication requires the user to enter a username and password to connect

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.

A.Flood attack detection

B.The microwave interference detection

C.Spoof attack detection

D.Weak IV attack detection

A.Extending the structure mode basic service set

B.Infrastructure mode basic service set

C.Independent basic service set

D.Extending the basic service set