Memorize the characteristics of OSPFv2, as listed here:
■ Link-state routing protocol.
■ Classless protocol (supports VLSMs and CIDR).
■ Metric is cost (based on interface bandwidth by default).
■ Fast convergence. Uses link-state updates and SPF calculation.
■ Reduced bandwidth use. Sends partial route updates only when changes occur.
■ Routes are labeled as intra-area, interarea, external Type 1, or external Type 2.
■ Support for authentication.
■ Uses the Dijkstra algorithm to calculate the SPF tree.
■ Default administrative distance is 110.
■ Uses multicast address 126.96.36.199 (ALLSPFRouters).
■ Uses multicast address 188.8.131.52 (ALLDRouters).
■ Very good scalability. Recommended for large networks.
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