Router A and B are both running as PPPoE servers. Can Router A use "/ppp secret" accounts from Router B to authenticate PPPoE customers?

The correct choice is based on the fundamental principles of how PPPoE (Point-to-Point Protocol over Ethernet) servers and their authentication mechanisms operate. In a typical setup, each PPPoE server manages its own set of user accounts and authentication secrets. The "/ppp secret" entries found on a MikroTik router represent individual user credentials that are specific to that router.

Since Router A is its own independent PPPoE server, it cannot retrieve or use the "/ppp secret" accounts from Router B. Each router needs to authenticate its own clients based on the credentials that it has been configured with. This separation ensures that security and access controls are maintained, as each router operates in isolation without sharing its authentication database with another. Therefore, Router A cannot use credentials from Router B for PPPoE authentication, validating the choice of false.