It depends on the number of routers you have that are running OSPF. Type 1 & 2 LSA's are contained within an area. If you have a lot of routers all in one area then each change needs to be flooded to all other routers within that area.
Area's are a good way to reduce the load on routers, reduce the size of the link-state database and contain the amount of LSA's needed within that area.
To be more specific, Once the DR and BDR have been elected, the other routers (known as DRothers) will establish adjacencies with the DR and BDR only. All routers continue to multicast Hellos to the AllSPFRouters
address 126.96.36.199 so that they can track neighbors, but DRothers multicast update packets to the AllDRouters address 188.8.131.52. Only the DR and BDR will listen to this address; in turn, the DR will flood the updates to the DRothers on 184.108.40.206.
And regarding your original question of using multi area it is because An OSPF routing domain can be split into several subdomains, called areas, which limit the scope of LSA floodig. A router having attachments to multiple areas is called an "area border router" (ABR). The primary function of an ABR is to provide its attached areas with Type-3 and Type-4 LSAs, which are used for describing routes and AS boundary routers (ASBRs) in other areas, as well as to perform actual inter-area routing.
As Narayan said yes it does.. But also areas can help in NBMA environments as well ie a good example would be if you had a point to multipoint WAN configuration. You would generally want this in it's own area so if there are changes in any other area you do not flood your wan links with unnecessary updates.
There is another advantage of multi area OSPF that has not been clearly described in this thread. Receipt of LSA type 1 or 2 causes full calculation of the Link State Algorithm (Dijkstra) but receipt of LSA type 3 does not cause full calculation of the Link State Algorithm. So if it were single area OSPF any link state change on any router would force a full calculation on all routers. But in multi area OSPF a router only does a full calculation when there is a link state change within its own area but not a full calculation when there is a link state change in a different area. As the network gets larger this becomes a significant performance difference.
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