Based on the exhibit output, which of the following statements is TRUE?

Comprehensive and Detailed Explanation with Exact Extracts:

Exhibit Analysis:

The output shows real-time ICMP packet captures (echo requests/replies) with detailed metadata (interface, source/destination IP, protocol, size, TTL).

The command tools system traffic-monitor protocol icmp confirms this is a tcpdump-like utility (packet capture tool), not a log file.

Mechanism for Packet Capture:

Capture-filter ACL is required to copy data-plane packets (like ICMP between hosts) to the CPM for analysis by traffic-monitor.

Extract from Nokia SR Linux Troubleshooting Guide:

"traffic-monitor is a CPM-based packet capture tool. To capture data-plane traffic (e.g., host-to-host ICMP), a capture-filter ACL must be applied to interfaces to copy packets to the CPM."

Extract from Nokia SR Linux ACL Configuration Guide:

"Unlike cpm-filter (for control-plane protection), capture-filter ACLs are designed to mirror user traffic to the CPM for debugging via traffic-monitor."

Why Other Options Are False:

A: Generic "ACL filter" is ambiguous. Only capture-filter ACLs copy data-plane traffic to the CPM for traffic-monitor.

C: cpm-filter policer rate-limits control-plane traffic (e.g., ICMP to the router), not host-to-host ICMP. It does not enable packet capture.

D: cpm-filter handles control-plane traffic destined for the router (e.g., ICMP to router IPs), not transit traffic. It does not support traffic-monitor.