The best way to transfer only the firewall filter rules is to use the export command for just that section:
Command:
/ip firewall filter export
This produces a readable script containing only the firewall filter rules. This method is safer than editing binary backups and more efficient than exporting the global configuration and deleting unrelated parts.
Evaluation:
* A.#Correct - clean and script-based approach
* B.#You cannot selectively back up just firewall rules using the backup function (it's system-wide)
* C.#Editing a backup file is not recommended and often not possible (it's binary)
* D.#Too cumbersome and error-prone
MTCNA Course Manual - Configuration Transfer:
"Use export to get script output of specific sections. Backups are for full system restore." Rene Meneses Guide - Migrating Configurations:
"Export is recommended for transferring specific configurations like firewall rules." Terry Combs Notes - Export vs Backup:
"Backups = full system. Use export for clean, readable configuration transfer."