Network Technologies removal exam

What is a common cause of signal attenuation in wireless networks?

• Microwave ovens boosting the signal

• Wi-Fi analyzers boosting AP strength

• Distance from the antenna

• Captive portals blocking packets

What does RSSI measure?

• Internet speed

• Signal strength of a Wi-Fi signal

• Network bandwidth

• Ping time of a packet

What is the minimum SNR value for good Wi-Fi performance?

• 10

• 15

• 25

• 5

Which factor causes multipath interference in wireless networks?

• Absorption through walls

• Refraction through water

• Reflection from shiny surfaces

• EMI from Bluetooth devices

Which frequency is more susceptible to interference but penetrates better through walls?

• 2.4 GHz

• 5 GHz

• 900 MHz

• 6 GHz

What can help locate optimal antenna placement?

• Encryption key sniffers

• Thermal maps and site surveys

• MAC filters

• Firewalls

What happens in an overcapacity scenario on a wireless AP?

• Too many clients degrade network performance

• Only wired clients are affected

• Performance improves due to increased usage

• Signal is amplified automatically

What is a common fix for frequency mismatch issues?

• Turning off DHCP

• Updating the client adapter

• Using a different browser

• Rebooting the switch

What is the role of Wi-Fi analyzers?

• Boosting transmission power

• Encrypting wireless data

• Scanning APs and measuring RSSI/SNR

• Blocking rogue APs

What channels should be used to avoid overlap in a 2.4 GHz Wi-Fi network?

• 1, 3, 5

• 2, 4, 6

• 1, 6, 11

• 4, 8, 12