H12-311 Free Practice Test

The Barker code is an 11-bit sequence (for example, 10110111000), which has advantages in wireless transmission, which can effectively reduce interference, but reduces efficiency.

1. A. True
2. B. False

Correct Answer: A

Spread-spectrum technology is the basis for transmitting wireless data using the ISM band.

1. A. True
2. B. False

Correct Answer: A

In the term of PoE, what does the AP belong to?

1. A. PSE
2. B. PD
3. C. PI
4. D. PSU

Correct Answer: A

The Int-Serv model provides users with end-to-end absolute QoS guarantees, but the reason for the lack of successful large-scale commercial use is.

1. A. Limited bandwidth reservation
2. B. Low forwarding efficiency
3. C. Poor scalability
4. D. Not conducive to traffic regulation

Correct Answer: C

The parameter used in the 802.11 frame to check the integrity of the received frame is .

1. A. Frame Control
2. B. Duration
3. C. FCS
4. D. Sequence Control Bit

Correct Answer: C