H12-311 Free Practice Test

For the polarization of electromagnetic waves, the following description is correct (Select 3 Answers).

1. A. The antenna radiates electromagnetic waves to the surrounding space, and the direction of the electric field changes according to a certain law.
2. B. The polarization of the antenna refers to the direction of the magnetic field strength formed by the antenna radiation.
3. C. If the electric field of the electric wave is perpendicular to the ground, we call it a vertically polarized wave.
4. D. If the transmitting antenna is circularly polarized, the receiving antenna must also be circularly polarized, and both polarization directions must be the same

Correct Answer: ABD

Which modulation method does the following picture belong to?

1. A. amplitude modulation
2. B. frequency modulation
3. C. phase modulation
4. D. modulation

Correct Answer: B

The AP can provide power and data transmission through the POE switch.

1. A. True
2. B. False

Correct Answer: A

Which of the following standards is WLAN (Select 2 Answers)?

1. A. 802.11a/b/g/n
2. B. WPA
3. C. WPA2
4. D. 802.11i

Correct Answer: BC

Telnet is one of the ways to remotely manage APs. You can configure telnet authentication based on username and password.

1. A. True
2. B. False

Correct Answer: A