Sim-Ex™ Practice Exams for CCNP Route : Practice Questions

IS-IS (Intermediate System in OSI) Questions

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Q4. OSPF uses DR (Designated Router) to flood the media with Hello packets. IS-IS also uses similar concept to flood the media with Hello packets. Which of the following is analogous to DR of OSI in IS-IS environment?

A. Designated Intermediate System (DIS)

B. Authorized Intermediate System (AIS)

C. Designated Intermediate Router (DIR)

D. Authorized Intermediate Router (AIR)

Correct Answer: A


DIS (Designated Intermediate System) is the term used for the router that is elected for flooding the LAN media with Hello packets. The functions of DIS is analogous to DR (Designated Router) used in OSPF environment.

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