Hi,
What is the meaning of the following states in OSPF?
(intra-area | inter-area | ext-1 | ext-2 | imported-ext-1 | imported-ext-2)
regards.
You can find the meanings explained here
http://wiki.mikrotik.com/wiki/Manual:OSPF_Case_Studies#Multi-area_networks
The answer to your question is that this is fundamental OSPF knowledge, and you really should take some time to learn how OSPF works in order to best understand it.
The short answer, though, is that these represent the preferred types of routes in descending order:
intra-area: destination is in the same OSPF area
inter-area: destination is in some other OSPF area
ext-1: external route redistributed into OSPF (type1 metric = seed cost + path cost)
ext-1: external route redistributed into OSPF (type2 metric = seed cost only - ties broken by path cost to reach the router that injected the route)
imported ext1 and ext2 are the same as ext, but used in NSSA areas.
Essentially, an intra area route will always win, even if the cost is higher than an inter-area route
etc…