Section: Core

18) Which statement is true concerning how external conditions affect a wireless link's range?

1. The higher the frequency, the farther the signal travels.
   
2. An omnidirectional antenna increases a signal's range.
   
3. Packet error rates increase on the signal's fringe.
   
4. A dish antenna reduces the signal's range.
   

A noisy or unstable environment can cause the range of a wireless LAN link to be decreased. The packet error rate of an RF link is greater at the fringes of coverage due to a small signal-to-noise ratio. Also, adding interference effectively raises the noise floor, lessening the likelihood of maintaining a solid link.

Exam Objective: 2.5 Compare and contrast wireless networking standards and encryption types.