802.11b DSSS performance is negatively affected by which of the following factors? (Select three.)
Answer(s): B,C,D
From the study guide, 802.11b DSSS is affected by the negative effects of Multipath and all-band intereference (in this case, a co-located Bluetooth device). Although Near/far is a performance problem for a remote client station, it does not necessarily have a negative impact on the Wireless LAN as a whole.
According to the IrDA, what is the maximum speed for an Infrared LAN system?
Answer(s): C
According to the study guide and the information present on the IrDA web-site, the max. speed for a Infra-red LAN system is 4mpbs. Therefore the answer should be C.
Manufactures of 802.11 compliant wireless LAN client devices allow for configuration of which of the following?
Answer(s): B,E
The IEEE 802.11 standard specifies two methods of authentication: Open System authentication and Shared Key authentication. The simpler and also the more secure of the two methods is Open System authentication. For a client to become authenticated, the client must walk through a series of steps with the access point.
CWNA Official Study Guide, Page 174
What term best describes a device designed to increase the power of the RF signal in a wireless LAN?
What spread spectrum technology is more scalable for increasing the number of simultaneously active, co-located systems?
Answer(s): A
An understood advantage and also one of the biggest advantages of DSSS systems over FHSS systems is greater system throughput (speed). In DSSS, speeds of upto 11 mbps can be acheived whereas FHSS only allows a max. of 2 Mbps (while simultanously operating in 802.11 compliant mode).
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