What is a feature of the OSPF routing protocol?
- OSPF authentication is configured in the same way on IPV4 and IPV6 networks.
- The SPF algorithm chooses the best path based on 30-second updates.
- Routers can be grouped into autonomous systems to support a hierarchical system.
- It scales well in both small and large networks.
Explanation: OSPF uses the SPF algorithm to choose the best path. Routing changes trigger routing updates (no 30-second updates). In IPv4, OSPF uses MD5 authentication between two neighboring OSPF routers. In IPv6, OSPFv3 does not include any authentication capabilities of its own. Instead it relies entirely on IPsec to secure communications between neighbors. Routers can be grouped into areas to support a hierarchical system.
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