In OSPF (Open Shortest Path First), routers can have different roles: Designated Router (DR), Backup Designated Router (BDR), and DROther. These roles help manage and optimize the OSPF network traffic.
DR and BDR are elected to minimize the number of adjacencies and reduce the amount of routing information exchange.
DROther routers are neither DR nor BDR but can still participate in the OSPF network by maintaining adjacencies with DR and BDR.
Analyzing the Exhibit:
The exhibit shows the OSPF neighbor states for the local FortiGate.
Neighbor ID 0.0.0.1 is in the state Full/DR (Designated Router).
Neighbor ID 0.0.0.3 is in the state Full/DROther (DROther).
Neighbor ID 0.0.0.10 has no specific designation, implying it is neither DR nor BDR.
Conclusion:
Since the local FortiGate shows neighbors in Full/DR and Full/DROther states and itself does not have a state of DROther, it can be concluded that the local FortiGate is not a DROther.
References:
Fortinet Community: Understanding OSPF roles and states(Welcome to the Fortinet Community!)(cyruslab).
Fortinet Documentation: OSPF neighbor states and elections(Fortinet Docs).
Questions # 12:
Which of the following regarding protocol states is true?
Options:
A.
proto_state=00 indicates that UDP traffic flows in both directions.
B.
proto_state-01 indicates an established TCP session.
C.
proto_state=10 indicates an established TCP session.
proto_state=00: Indicates no traffic or a closed session.
proto_state=01: Typically indicates one-way ICMP traffic or a partially established TCP session.
proto_state=10: Indicates an established TCP session, where the session has completed the three-way handshake and both sides can send and receive data.
proto_state=11: Often indicates a fully established and active bidirectional session.
Explanation of correct answer:
proto_state=10is the correct indication for an established TCP session as it signifies that the session is fully established and active.
References
Fortinet Network Security 7.2 Support Engineer Documentation
