Which subtype of traffic log includes information from a one-armed sniffer?

The subtype of traffic log that includes information from a one-armed sniffer is the sniffer log. A one-armed sniffer is a configuration on a firewall where the device captures traffic from the network for analysis without being in the direct data path. It listens to the traffic flowing through a particular part of the network to provide insights into the traffic patterns, performance, and security incidents.

Sniffer logs are specifically designed to capture this detailed traffic information, which can include source and destination IP addresses, protocols, and ports, among other data. They are vital for network monitoring and troubleshooting as they provide a comprehensive view of the data packets traversing the network.

Other types of logs, such as forward, local, and filter, serve different purposes. Forward logs usually document the actions taken by the firewall regarding permitted or denied traffic when it is routed through the firewall. Local logs tend to store information specifically tied to the local device's operations rather than traffic analysis, and filter logs involve filtering certain criteria to show relevant traffic but do not specifically relate to the sniffer data. Therefore, sniffer logs are uniquely tailored for capturing and analyzing traffic through a one-armed sniffer configuration.