Sinopsis
Radio frequencies are high-frequency, alternating current (AC) signals that are radiated into the air through an antenna, creating radio waves. Radio waves propagate away from the antenna in a straight line in all directions at once, just like light rays from a bulb. More light bulbs spread around the room will provide better overall lighting. This translates into a stronger average signal for mobile clients. When radio waves hit a wall, door, or any obstruction, there is attenuation of the signal, which weakens the signal and can reduce throughput. The signal can also be refl ected or refracted.
WLAN devices work in a frequency range (wavebands) that belongs to the industrial, scientifi c, and medical (ISM) radio bands. The ISM band was originally reserved internationally for the use of RF electromagnetic fi elds for industrial, scientifi c, and medical purposes other than communications. In general, communications equipment must accept any interference generated by ISM equipment.
Content
- Planning and Designing 802.11 Wireless Technologies
- Configure and Troubleshoot L2/L3 Network Infrastructure to Support WLANs
- Configure and Troubleshoot Infrastructure Application Services
- Configure and Troubleshoot Autonomous Deployment Mode
- Configure and Troubleshoot the Cisco Unified Wireless Deployment Model
- Configure and Troubleshoot WCS
- Configure and Troubleshoot WLAN Services
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