nerdexam
Cisco

400-007 · Question #82

An existing wireless network was designed to support data traffic only. You must now install context Aware services for location tracking changes must be applied to the existing wireless network to…

The correct answer is A. Add access points along the perimeter of the coverage area. D. Install additional access points in monitor mode where the co-channel interference would. Improving Cisco Context Aware Services location accuracy requires both perimeter AP coverage and dedicated monitor-mode APs to maximize RSSI triangulation data without adding co-channel interference.

Designing Network Services

Question

An existing wireless network was designed to support data traffic only. You must now install context Aware services for location tracking changes must be applied to the existing wireless network to increase the location accuracy? (Chose two)

Options

  • AAdd access points along the perimeter of the coverage area.
  • BIncrease the access point density to create an average inter-access point distance of less than 40
  • CUse directional antennas to provide more cell overlapping
  • DInstall additional access points in monitor mode where the co-channel interference would
  • EFine tune the radio configuration of the access point to have a higher average transmission power

How the community answered

(19 responses)
  • A
    84% (16)
  • B
    11% (2)
  • C
    5% (1)

Why each option

Improving Cisco Context Aware Services location accuracy requires both perimeter AP coverage and dedicated monitor-mode APs to maximize RSSI triangulation data without adding co-channel interference.

AAdd access points along the perimeter of the coverage area.Correct

Adding APs along the perimeter of the coverage area ensures that clients near the edges are heard by multiple APs at varying angles and distances, which is essential for accurate RF-based triangulation used by the Cisco Mobility Services Engine.

BIncrease the access point density to create an average inter-access point distance of less than 40

A 40-foot inter-AP distance targets high-density data throughput coverage, not the specific multilateration geometry required for location accuracy, which depends more on perimeter and monitor-mode AP placement.

CUse directional antennas to provide more cell overlapping

Directional antennas reduce cell overlap and narrow the RF pattern, which degrades location accuracy because the MSE requires overlapping RSSI readings from multiple APs to calculate a position.

DInstall additional access points in monitor mode where the co-channel interference wouldCorrect

Installing additional APs in monitor mode allows them to passively listen on all channels simultaneously and report client RSSI data to the MSE without associating clients or contributing co-channel interference, directly improving location calculation accuracy.

EFine tune the radio configuration of the access point to have a higher average transmission power

Increasing AP transmission power actually reduces location accuracy by causing fewer APs to report meaningfully differentiated RSSI values for a given client, flattening the signal gradient used for triangulation.

Concept tested: Cisco Context Aware Services location accuracy design

Source: https://www.cisco.com/c/en/us/td/docs/wireless/mse/3350/7-3/CAS_Configuration_Guide/Guide/CAS_73.html

Topics

#wireless LAN#Context Aware Services#location tracking#AP placement

Community Discussion

No community discussion yet for this question.

Full 400-007 Practice