Which tool would be useful for analyzing changes or additions to an existing dial plan?

A.
DRS

B.
CAR

C.
QRT

D.
Dependency records

E.
RTMT

F.
DNA

Explanation:

Dialed Number Analyzer (DNA) allows you to test a Cisco Unified CallManager dial plan configuration prior to deploying it. The tool analyzes the dialed digits and shows details of the calls. You can use these results to diagnose the dial plan, identify problems.