Which protocol is implemented when an organization must verify network performance, troubleshoot issues, and use an agent to communicate between monitoring tools and end devices?

FIP (Fabric Initialization Protocol) is related to Fibre Channel over Ethernet (FCoE) and is not a general network monitoring protocol.

NIP is not a recognized standard network protocol for performance monitoring in this context.

NFS (Network File System) is a distributed file system protocol used for file sharing, not for network monitoring.

SNMP (Simple Network Management Protocol) uses agents on network devices to collect and send management information to a centralized network management system (NMS), allowing for comprehensive network performance monitoring, troubleshooting, and configuration management.