Using a configuration management database (CMDB) would be the best approach because it provides a centralized repository where all infrastructure components, their configurations, and their relationships can be tracked and managed. This would facilitate efficient operations by providing visibility into the infrastructure and help in quick fault isolation by analyzing the components' interdependencies. Setting up SNMP traps is important for monitoring, but it does not offer comprehensive visibility into the configuration and relationships of components. Deployment of network analyzers would help in diagnosing network-related issues but doesn't cover other infrastructure aspects. While documentation is crucial for maintaining system knowledge, it is not as dynamic or integrated as a CMDB.