正解:A
The ASA and ASASM implementations of NetFlow Secure Event Logging (NSEL) provide a stateful, IP flow tracking method that exports only those records that indicate significant events in a flow. The significant events that are tracked include flow-create, flow-teardown, and flow-denied (excluding those flows that are denied by EtherType ACLs). Reference: https://www.cisco.com/c/en/us/td/docs/security/asa/asa92/configuration/general/asa-general-cli/ monitor-nsel.html The significant events that are tracked include flow-create, flow-teardown, and flow-denied (excluding those flows that are denied by EtherType ACLs).
The ASA and ASASM implementations of NetFlow Secure Event Logging (NSEL) provide a stateful, IP flow tracking method that exports only those records that indicate significant events in a flow. The significant events that are tracked include flow-create, flow-teardown, and flow-denied (excluding those flows that are denied by EtherType ACLs). Reference: https://www.cisco.com/c/en/us/td/docs/security/asa/asa92/configuration/general/asa-general-cli/ monitor-nsel.html