350-401 · Question #466
When is an external antenna used inside a building?
The correct answer is B. when it provides the required coverage. External antennas are used inside a building when their specific radiation patterns and gain characteristics are necessary to achieve the desired wireless coverage, capacity, or to mitigate interference in particular areas.
Question
Options
- Aonly when using Mobility Express
- Bwhen it provides the required coverage
- Conly when using 2 4 GHz
- Donly when using 5 GHz
How the community answered
(42 responses)- B93% (39)
- C2% (1)
- D5% (2)
Why each option
External antennas are used inside a building when their specific radiation patterns and gain characteristics are necessary to achieve the desired wireless coverage, capacity, or to mitigate interference in particular areas.
Mobility Express is a deployment model for Cisco APs; the choice of internal or external antennas is determined by coverage needs, not the deployment model itself.
External antennas offer flexibility in beam pattern, gain, and placement, which can be crucial for optimizing coverage in challenging environments like long hallways, high-density areas, or locations requiring specific signal shaping. Using external antennas allows engineers to tailor the RF design to meet specific coverage and capacity requirements precisely, unlike fixed-pattern integrated antennas.
External antennas are available for both 2.4 GHz and 5 GHz frequency bands, and their use is not restricted to a single band.
External antennas are available for both 2.4 GHz and 5 GHz frequency bands, and their use is not restricted to a single band.
Concept tested: Wireless antenna types and deployment scenarios
Source: https://www.cisco.com/c/en/us/products/collateral/wireless/aironet-antennas-accessories/product_data_sheet0900aecd80680e60.html
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