A large corporation that frequently integrates networks from newly acquired businesses has just
decided to use OSPF as the corporate routing protocol instead of EIGRP. What two benefits will
the change from EIGRP to OSPF provide to the corporation? (Choose two.)
A.
the ability to automatically summarize networks
B.
the ability to support multi-vendor routers
C.
the ability to redistribute default and static routes
D.
the ability to use VLSM
E.
the ability to create a hierarchical design using areas
Explanation:
Open Shortest Path First (OSPF) is a routing protocol developed for Internet Protocol (IP)
networks by the Interior Gateway Protocol (IGP) working group of the Internet Engineering Task
Force (IETF). Unlike, EIGRP, OSPF is standards based which is supported by multiple router
vendors.
Unlike RIP and EIGRP, OSPF can operate within a hierarchy. The largest entity within the
hierarchy is the a utonomous system (AS), which is a collection of networks under a common
administration that share a common routing strategy. OSPF is an intra-AS (interior gateway)
routing protocol, although it is capable of receiving routes from and sending routes to other ASs.
An AS can be divided into a number of areas, which are groups of contiguous networks and
attached hosts. Routers with multiple interfaces can participate in multiple areas. These routers,
which are called Area Border Routers, maintain separate topological databases for each area.