When a router undergoes the exchange protocol within OSPF, in what order does it pass through each state?

When a router undergoes the exchange protocol within OSPF, in what order does it pass through each state?
A . exstart state > loading state > exchange state > full state
B . exstart state > exchange state > loading state > full state
C . exstart state > full state > loading state > exchange state
D . loading state > exchange state > full state > exstart state

View Answer

Answer: B

Explanation:

OSPF states for adjacency formation are (in order) Down, Init, Attempt, 2-way, Exstart, Exchange, Loading and Full.

Reference:

Why Are OSPF Neighbors Stuck in Exstart/Exchange State?

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f0d.shtml