Wireless Troubleshooting

Question 1

Wireless Troubleshooting: RFI

Answer 1

wireless communication can be interrupted due to Radio Frequency Interference - common RFI sources that impact wireless networks include 2.4GHz cordless phones, microwave ovens, baby monitors, game consoles

Question 2

Wireless Troubleshooting: Signal Strength

Answer 2

Received Signal Strength Indicator (RSSI) value measures the power of a wireless signal, varies based on distance from a wireless antenna and physical objects interfering with line of sight communication

Question 3

Wireless Troubleshooting: Misconfiguration of Wireless Parameters

Answer 3

a variety of wireless parameters must match between a wireless client and a wireless access oint (AP)

Question 4

Wireless Troubleshooting: Latency

Answer 4

wireless networks can experience more delay than their wired counterparts, one reason being the use of CSMA/CA, which introduces a random delay before transmitting data in an attempt to avoid collisions

Question 5

Wireless Troubleshooting: Multiple Paths of Propagation

Answer 5

electromagnetic waveform cannot pass through a perfect conductor, conductive objects in a space can bounce the wireless signal around causing data to arrive at uneven intervals

Question 6

Wireless Troubleshooting: Incorrect AP Placement

Answer 6

WAPs should be strategically located in a building to provide sufficient coverage to all desired coverage areas, should have overlapping coverage areas among wireless APs with nonoverlapping channels

Question 7

Wireless Troubleshooting: Refraction

Answer 7

refraction is the bending of a light wave when it enters a medium where the speed is different - can cause signal changes, lower data rates and high retries, leads to an overall lessening of capacity

Question 8

Wireless Troubleshooting: Absorption

Answer 8

occurs when a material is converting the signals energy into heat