Traffic mirroring is a technique that copies the traffic from a source port or VLAN to a destination port or VLAN, where it can be analyzed by a security device or tool. Traffic mirroring does not affect the original traffic flow and does not introduce any latency or modification to the packets. Inline traffic interrogation is a technique that forwards the traffic directly to the security device or tool, where it can be inspected and modified before being sent to the destination. Inline traffic interrogation can introduce latency and affect the performance of the network. Reference:
Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) - Cisco, Module 2: Security Monitoring, Lesson 2.2: Network Security Monitoring Tools
200-201 CBROPS - Cisco, Exam Topics, 2.0 Security Monitoring, 2.2 Describe the impact of various technologies on security monitoring Cisco Certified CyberOps Associate Overview - Cisco Learning Network, Videos, 2.2 Describe the impact of various technologies on security monitoring