In an ISDN link, a router dials another router to establish a connection. What is the traffic that enables this dialing process called?
  1. Access-list traffic
  2. Global traffic
  3. Interesting traffic
  4. ISDN traffic
Explanation
Answer: C - The traffic that enables the process of dialing from a router to another using an ISDN link is called interesting traffic.

Key Takeaway: The interesting packet activates the dialing sequence in an ISDN connection and resets the “idle-timeout” timer. Interesting traffic gets the link up and once the link is up, any traffic can cross the link. The lack of interesting traffic brings the link down.
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