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300-430 · Question #277

Refer to the exhibit. An engineer must identify jammer devices on the wireless network. The AP must scan all configured channels. Which AP mode must be configured to accomplish this?

The correct answer is A. Monitor. Monitor mode dedicates an AP entirely to scanning all configured channels for threats such as rogues and jammers, without serving any wireless clients.

Monitoring and Troubleshooting

Question

Refer to the exhibit. An engineer must identify jammer devices on the wireless network. The AP must scan all configured channels. Which AP mode must be configured to accomplish this?

Exhibit

300-430 question #277 exhibit

Options

  • AMonitor
  • BLocal
  • CFlexConnect
  • DBridge

How the community answered

(45 responses)
  • A
    89% (40)
  • B
    4% (2)
  • C
    4% (2)
  • D
    2% (1)

Why each option

Monitor mode dedicates an AP entirely to scanning all configured channels for threats such as rogues and jammers, without serving any wireless clients.

AMonitorCorrect

An AP in Monitor mode does not serve client traffic; instead it passively scans all configured channels continuously, enabling it to detect rogue APs, jamming devices, and other RF threats across the entire spectrum. This off-channel scanning capability is essential for identifying interference sources like jammers that may only appear on specific channels. Local mode APs only briefly scan off-channel during normal operation, making Monitor mode the correct choice for thorough threat detection.

BLocal

Local mode is the default AP mode that serves client traffic and only performs brief off-channel scans, making it insufficient for comprehensive jammer detection across all channels.

CFlexConnect

FlexConnect mode is designed for branch office deployments where the AP can locally switch traffic when the WAN link to the controller is down, and is not intended for RF threat scanning.

DBridge

Bridge mode is used to create a wireless bridge connection between two wired network segments and does not perform channel scanning for threat detection.

Concept tested: AP Monitor mode for wireless threat detection

Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/9800/17-12/config-guide/b_wl_17_12_cg/m_ap_modes.html

Topics

#monitor mode#jammer detection#channel scanning#AP mode

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