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» Cisco » Examen Cisco CCNA V3.1 » Module 4 » Final » Question 19/39

19.A branch office reports excessive connect time charges for an ISDN circuit used to connect to the regional office. Upon investigation of this issue, it is discovered that when an ISDN connection is initiated to the regional office it remains connected for an excessive amount of time. Which of the following configuration changes could be made to DDR on the router to reduce these connect time charges?

use PPP multilink
lower idle timer setting
use CHAP authentication
change DDR from legacy to dialer profiles