H12-311-ENU exam

BSS is called Basic Service Set, and BSS can be divided into Independent BSS and Infrastructure BSS.A . TrueB . FalseView AnswerAnswer: A

Which of the following standards organizations is proposed by the CAPWAP protocol?A . FCCB . IETFC . CCCD . ETSIView AnswerAnswer: 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.A . TrueB . FalseView AnswerAnswer: A

There are four wireless STAs. Which workstations occupy the channel preferentially according to the following backoff time parameters?A . 5B . 7C . 4D . 6View AnswerAnswer: C

What are the two basic service sets included in BSS (Select 2 Answers)?A . Independent basic service setB . Infrastructure mode basic service setC . Extending the basic service setD . Extending the structure mode basic service setView AnswerAnswer: A B

When a data frame is sent and acknowledged, what is the time interval to wait before the next data frame is sent ()?A . SIFSB . IFSC . DIFSD . PIFSView AnswerAnswer: C

IEEE is the standard organization responsible for the use of wireless frequencies in the United States.A . TrueB . FalseView AnswerAnswer: B

What is the maximum rate supported by the original 802.11 protocol?A . 1B . 2C . 5.5D . 11View AnswerAnswer: B

Which country or region is ETSI a standard organization?A . ChinaB . USAC . JapanD . EuropeView AnswerAnswer: B

Spread-spectrum technology is the basis for transmitting wireless data using the ISM band.A . TrueB . FalseView AnswerAnswer: A