OSPF “advanced” features (not in RIP)
Security: all OSPF messages authenticated (to prevent malicious intrusion); TCP connections used
Multiple same-cost paths allowed (only one path in RIP)
For each link, multiple cost metrics for different TOS (eg, satellite link cost set “low” for best effort; high for real time)
Integrated uni- and multicast support:
- Multicast OSPF (MOSPF) uses same topology data base as OSPF
Hierarchical OSPF in large domains.