N10-005 · Question #797
Joe, a network technician, is tasked with setting up a new wireless network in an office for office laptops and desktops only. The surrounding offices already have many wireless networks. Joe…
The correct answer is B. Determine which wireless channels and bands to use to mitigate as much interference as possible. Joe must choose the right wireless channel and frequency band to avoid interference from the 30+ existing 802.11b/g networks. Since all neighboring networks are on the 2.4 GHz band, selecting a different band or non-overlapping channels is the correct technical approach.
Question
Joe, a network technician, is tasked with setting up a new wireless network in an office for office laptops and desktops only. The surrounding offices already have many wireless networks. Joe discovered that over 30 wireless networks were showing up as he completed a wireless survey of the office. Every single one of the networks that Joe was able to see while conducting the wireless survey were 802.11b/g networks. Which of the following should Joe consider before purchasing/installing the new wireless access points?
Options
- AMove the WAP so that it is close to the interior walls.
- BDetermine which wireless channels and bands to use to mitigate as much interference as possible.
- CTurn the SSID broadcasts off to decrease interference.
- DDetermine if the business should relocate to a building with a lot less surrounding wireless networks.
How the community answered
(54 responses)- A2% (1)
- B85% (46)
- C6% (3)
- D7% (4)
Why each option
Joe must choose the right wireless channel and frequency band to avoid interference from the 30+ existing 802.11b/g networks. Since all neighboring networks are on the 2.4 GHz band, selecting a different band or non-overlapping channels is the correct technical approach.
Proximity to interior walls affects signal propagation and coverage but does not reduce RF interference from neighboring 802.11b/g networks operating on overlapping channels.
802.11b and 802.11g operate exclusively on the 2.4 GHz band, which has only three non-overlapping channels (1, 6, 11). By evaluating channel utilization and considering the 5 GHz band (used by 802.11a/n/ac), Joe can deploy the new WAP with minimal co-channel and adjacent-channel interference from the 30+ neighboring networks.
Disabling SSID broadcast hides the network name from passive scans but has no effect on RF signal interference between access points.
Relocating the business is a business decision, not a technical networking solution, and does not address the wireless interference problem.
Concept tested: Wireless channel and band selection to minimize interference
Source: https://learn.microsoft.com/en-us/windows-hardware/drivers/network/802-11-wireless-lan-channels
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