A.The polarization of the antenna refers to the direction of the magnetic field strength formed when the antenna radiates
, The direction of the electric field changes according to a certain rule

B.If the electric field direction of the electric wave is perpendicular to the ground, we call it a vertically polarized wave

C.The antenna radiates electromagnetic waves to the surrounding space

D.If the transmitting antenna is circularly polarized, the receiving antenna must also be circularly polarized, and the polarization direction of the two must be the same.

A.Service VLAN under the service set template

B.PVID VLAN under the WLAN ESS interface

C.Mainly responsible for transmitting data when WLAN users go online

D.Responsible for the establishment of the CAPWAP tunnel between AC and AP

A.adjust AP Power supply

B.adjust AP Transmit power

C.adjust AP Antenna angle

D.adjust AP Access bandwidth

A.FIFO model

B.Best Effort model

C.IntServ model

D.DiffServ model

A.The shared secret requires users and AP Use the same shared secret

B.For skinny AP, The shared key is preset in AC middle

C.After adopting shared key authentication, you must use WEP Encryption

D.The disadvantages of shared keys are poor scalability and not very secure