Chapter 11

1: What is IS-IS?
A1: Answer: The IS-IS routing protocol is a link-state routing protocol from the OSI protocol suite.
2: What is Dual IS-IS?
A2: Answer: Dual IS-IS, also known as Integrated IS-IS, allows you to carry IP routing information as well as CLNS information. Dual IS-IS can be implemented using both or just IP.
3: What is the difference between a NET and an NSAP?
A3: Answer: The NSAP is the full address of a system (IS or ES) in CLNS and determines the area address in IP-only IS-IS. The NSAP with the N-selector set to 0 is the NET.
4: Which of the following packets are used in IS-IS?

  1. IIHs— IS-to-IS hellos

  2. EIHs— ES-to-IS hellos

  3. LSPs— link-state packets

  4. FSNPs— fragmented sequence number packets

  5. CSNPs— complete sequence number packets ...

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