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Which method is effective for detecting a system running in promiscuous mode?

  1. Ping Method

  2. ARP Method

  3. HTTP Monitoring

  4. VPN Connection

The correct answer is: Ping Method

The most effective method for detecting a system running in promiscuous mode is related to the ARP Method. When a network interface is in promiscuous mode, it processes all packets that travel over the network segment, not just those addressed to it. The ARP (Address Resolution Protocol) method involves analyzing ARP requests and responses on the network. In a typical network environment, devices only respond to ARP requests for their own IP addresses. However, if a network interface is in promiscuous mode, it can capture all ARP traffic, including requests and responses for addresses not assigned to it. By monitoring the ARP traffic and observing responses to requests that originate from different devices, it becomes possible to detect the presence of a system operating in this particular mode. This is particularly useful for identifying unauthorized listeners or sniffers on the network. In contrast, the Ping Method primarily assesses the reachability of a network host and does not effectively provide visibility into the traffic capture capabilities of a device. HTTP Monitoring focuses on the traffic of web protocols and would not reveal insights into whether a system is capturing all network packets. Finally, monitoring VPN connections does not pertain directly to promiscuous mode detection since it deals with encrypted tunnels and remote connectivity