The macro should contain the positive definition of the company networks , because the calling SPL already applies NOT to the macro ' s result. Conceptually, the expanded search becomes:
index=firewall sourcetype=pan\:traffic
NOT (src_ip IN (151.157.30.0/24, 26.06.18.0/24))
This excludes events whose src_ip belongs to either specified company network. Therefore, option A supplies the correct macro body.
Option B already contains NOT; placing it behind the outer NOT would effectively reverse the intended exclusion. Options C and D also use AND between two mutually distinct network conditions. A single source IP cannot simultaneously belong to both independent /24 networks, so this does not correctly describe the desired set.
In normal SPL notation, a macro invocation is represented with backticks, such as `company_networks`. The underlying design principle remains that macros encapsulate reusable SPL fragments, a capability explicitly covered in the supplied material.
Study Guide topics: SPL macros, Boolean filtering, IN, CIDR/network filtering, reusable search logic, detection optimization.
