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H3CSE-WLAN Sample Questions:

1. Because WDS is not clearly specified in the 802.11 protocol, AP equipment of various manufacturers is _____ WDS intercommunication

A) Yes
B) No

2. The media access mechanism of an 802.11 network is ______. In this mechanism, when the sender detects that the media is idle _______.

A) CSMA/CD: After waiting for the IFS time length, send data immediately, if a conflict occurs, start a timer Back-off-timer, when the timer counts down
B) CSMA/CA: After waiting for the IFS time length, the data will be sent immediately. If there is a conflict, a timer Back-off timer will be started, and the message will be resent when the timer counts down to zero.
C) CSMA/CD: After waiting for the IFS time length, start a timer Back-off Timer, and start sending messages when the timer counts down to zero.
D) CSMA/CA: After waiting for the IFS time length, start a timer Back-off Timer, and start sending messages when the timer counts down to zero.

3. Which of the following frequencies can 802.11n operate at?

A) 1.8GHz
B) 5GHz
C) 3.5GHz
D) 2.4GHz

4. In a WLAN, which of the following frames are control frames ___

A) Beacon
B) ACK
C) RTS
D) CTS

5. When WA2220X-AGP works as a bridge under 11a, by default, it can

A) 4; 15
B) 2; 30
C) 4; 30
D) 2; 15

Solutions: