Which of the following options is a possible wireless LAN security solution?
Answer(s): A
Use of PPTP with shared secrets is very simple to implement and provides a reasonable level of security, especially when added to WEP encryption. Use of IPsec with shared secrets or certificates is generally the solution of choice among security professionals in this arena.
CWNA Official Study Guide, Page 276
For which of the following technologies will narrowband RF interference cause significant problems during implementation?
Answer(s): B
According to the study guide, FHSS systems are more resistent to Narrowband interference then DSSS systems. This is due to the agility of FHSS systems and their utilization of the entire 2.4 Ghz band (83.5 Mhz). Since HomeRF is an FHSS implementation and IrDA does not utilize RF technology
Which of the following statements are TRUE regarding antenna diversity? (Select all that apply.)
Answer(s): B,D
According to the study guide, antenna diversity is achieved with multiple antennas and multiple inputs to a single receiver. Due to this configuration, only one antenna may be used to receive data at any given time by the receiver (based on the signal strength). Additionally, only one antenna may be used to transmit data at any given time (based on the previous antenna used for signal reception). Therefore, the answer should be B, C.
In a wireless LAN which of the following can cause RF signal gain? (Select all that apply.)
Answer(s): C,E
This is a tricky question. Ideally, the candidate would select just the amplifier as the RF signal gain element. However, the study guide mentions time and again that antennas may also be used to increase the gain of the RF signal. Therefore, the answer should be C, E.
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