单选题
Refer to the exhibit. The signal transmitted from the AP is reflected off a wall resulting in multipath interference at the client end. Which statement is true？ （） 
发布日期：2021-01-28
The transmitted signal from the AP arrives at the client at slightly different times resulting in phase shifting.
If signal 2 is close to 360 degrees out of phase with signal 1， the result is essentially zerosignal or a dead spot in the WLAN.
Multipath interference is less of an issue when using a DSSS technology because multipath is frequency selective.
If signal 1 is in phase with signal 2， the result is essentially zerosignal or a dead spot in the WLAN.
Multipath interference is solved by using dual antennas.
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