•We
have these types of routers:
–Internal
router: All networks (interfaces) connected directly to this router belong to
the same area. An internal-router has a single link-state database
–Area
Border router: ABR: He has at least 2 connected networks (interfaces) that are
in two different areas. ABR will have more than one link-state database, 1 for
each area. Its responsibility to exchange topology information between areas
–Backbone
router: at least one connected network in area 0 ( can be internal or ABR)
–Autnomous System Boundary
router: ASBR: at least one network participating in OSPF, and one network in
another routing domain. Its role is to exchange information between OSPF and
external routes.
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