Section 21.199 Security Techniques: and Wireless Infrastructure Security

Question 1

Wireless Infrastructure Security

Answer 1

Crucial for securing wireless networks in organisations

Question 2

Wireless Access Point Placement

Answer 2

WAPs allow wireless devices to connect to a wired network using Wi-Fi standards

Placement influences:
● Network range
● Coverage
● Security

Proper placement prevents unauthorised access by limiting signal leakage or
dead zones

Question 3

Wireless Access Point Placement

Placement Considerations

Answer 3

■ Avoid placing WAPs near external walls or windows to prevent signal leakage

■ Place WAPs in central locations for optimal coverage

■ Use unidirectional antennas when WAPs are near external walls

■ Mount WAPs on higher locations, such as ceilings, for better coverage

Question 4

Extended Service Set (ESS)

Answer 4

■ Multiple WAPs work together to provide seamless network coverage

■ Important for large buildings where a single WAP is insufficient

Question 5

Wireless Access Point Interference

Answer 5

nterference occurs when multiple WAPs use the same channels or overlapping frequencies

Types:
● Co-Channel Interference
● Adjacent Channel Interference

In the 2.4 GHz band, select Channels 1, 6, and 11 to avoid overlap

Question 6

Tools for ensuring good Wireless Access Point Coverage

Site Surveys

Answer 6

● Essential for planning and designing wireless networks

● Involves a site visit to test for radio frequency interference and identify optimal WAP installation locations

Question 7

Tools for ensuring good Wireless Access Point Coverage

Heat Maps

Answer 7

Graphical representations of:

○ Wireless coverage
○ Signal strength
○ Frequency utilisation

Useful for troubleshooting:
○ Coverage issues
○ Dead zones
○ Signal leakage

Aid in visualising the effectiveness of WAP placement and configuration