The objective of the external domain within the maintenance model is to provide early awareness of new and emerging threats, threat agents, vulnerabilities, and attacks that the organization needs in order to mount an effective and timely defense.

External monitoring domain

Explanation:

The objective of the external monitoring domain within the maintenance model is to provide the early awareness of new and emerging threats, threat agents, vulnerabilities, and attacks. That awareness leads to the creation of an effective and timely defense.

answer; revisionist;

answer; ///approx///5,000 miles;