Review Questions

1:	What type of information is stored in an Link-State database, and how is this information collected?
2:	Describe the use of the Link-State database in IS-IS.
3:	What is the difference between Level 1 and Level 2 Link-State databases?
4:	What is the meaning of Link-State database synchronization?
5:	Describe the general format of a link-state packet.
6:	List the four fields in the LSP header that adequately describe the LSP.
7:	What are TLVs?
8:	List five TLVs that carry metric information and where they are originally specified.
9:	What is the format of the LSP Identifier (LSPID)? Give an example.
10:	Name the types of metric information specified by ISO 10589.
11:	What are the limitations of the default metric specified by IS0 10589?
12:	How are the metric limitations of ISO 10589 addressed by TLVs Type 22 and Type 135 recently proposed in the IETF IS-IS Working Group ?
13:	What are sequence number packets? List all types.
14:	What are IS-IS mesh groups?
15:	What is maxage and maximum LSP regeneration interval? List the Cisco IOS commands that can be used to change their values.
16:	Can two routers in the same area have the same system ID? Briefly describe what happens when two routers in the same area are configured with the same system ID.