This read-only INTEGER reports whether this source IP address/mask entry was statically configured by NMAPS or dynamically learned via DHCP, per the description. An admin uses this to distinguish manually provisioned filter entries from ones the system learned automatically, which affects how they should be managed. For example, an admin sees hcxStuSrcIpAddrType report dynamic and knows not to manually delete the entry since DHCP renewal will manage its lifecycle.