Wireless Issues

Question 1

bluetooth, mice and cellphones can cause interference with wireless signals? TRUE or FALSE?

Answer 1

TRUE

Question 2

The below can all cause wireless issues, true or false?

encryption mismatch
overlapping channels
incorrect frequency incompatibility (e.g. 2GHz or 5Ghz)
wrong passphrase
ssid mismatch
wireless standard mismatch
untested updates

Answer 2

True

Question 3

It’s a good idea to disable xxx before troubleshooting wireless issues?

Answer 3

security (WPA2 etc)

Question 4

how does overlapping channels affect the S/N?

Answer 4

The S/N ratio to drop thus more interference

Question 5

making the office SSID the preferred network in the client software can help prevent what common issue?

Answer 5

connecting to the wrong SSID

Question 6

What two devices control signal bouncing and what do you need to be careful of when implementing them?

Answer 6

Repeaters and Reflectors. Be careful not make the network bigger than you wanted.

Question 7

diagnosing incorrect antenna / switch placement, what two peices of software can help determine how far your APs are transmitting?

Answer 7

Wireshark and AirMagnet

Question 8

In what scenario can refraction be an issue?

Answer 8

for long-distance outdoor wireless bridge links

Question 9

Regarding issues with signal to noise ratio, what is considered a good S/N ratio and what is considered poor?

Answer 9

25dB good. 10dB or lower poor.