CCNP / CCDP Routing (Building Scalable Cisco Networks)/ BSCI (Building Scalable Cisco Internetworks) Exam 
OSPF Practice Questions 

Exam Code 642-801 (BSCN/BSCI)

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Q6. Match the following with regard to OSPF operation:

A. DDP	1. A router that resides within an area.
B. Hello Packet	2. This includes summary information about link-state entries
C. Internal router	3. This packet includes information that enables routers to establish themselves as    neighbors.

        A.  A->3; B->2; C->1

        B.  A->2; B->3; C->1

        C.  A->1; B->2; C->3

        D.  A->3; B->1; C->2

Ans: B

Explanation:  

   In an OSPF environment,
1. A DDP (Data Description Packet) is used during the exchange protocol and includes summary information about link-state entries.
2. A hello packet is used during the hello process and includes information that enables routers to establish neighbor relationship.
3. An internal router is a router that resides within an area.

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