Free H12-311 Exam Braindumps (page: 17)

Page 16 of 75

The 802.11 physical layer standard defines some common operations of the wireless network at the physical layer: operations such as QoS, security, and roaming.

  1. True
  2. False

Answer(s): B



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. True
  2. False

Answer(s): A



802.11b is a protocol based on Orthogonal Frequency Division Multiplexing (OFDM) technology.

  1. True
  2. False

Answer(s): B



The 802.11n standard uses dual-band (2.4 GHz and 5 GHz), the theoretical transmission rate can reach up to 300 Mbps, and the actual test rate can reach more than 100 Mbps.

  1. True
  2. False

Answer(s): B






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