ADEM enables you to control reverse DNS lookups during path trace monitoring. By default, ADEM attempts to identify the hostname for every IP address it encounters. However, DNS lookups on private IP addresses (RFC1918) fail to resolve which adds to DNS traffic. To eliminate this traffic, you can configure ADEM to perform reverse lookups only for public IP addresses, ignoring all private ranges. Alternatively, you can retain the default setting to perform DNS lookup on all IP addresses. This optimization reduces network noise and improves the efficiency of path monitoring.