单选题When learning a new route, if a LSA received is not found in the topological database, what will an internal OSPF router do?（）AThe sequence numbers are checked, and if the LSA is val id it is entered into the topology database.BThe LSA is placed in the topological database and an acknowledgement is sent to the transmitting router.CThe LSA is dropped and a message is sent to the transmitting router.DThe LSA is flooded imme diately out of all the OSPF interfaces, except the interface from which the LSA was received.
单选题
When learning a new route, if a LSA received is not found in the topological database, what will an internal OSPF router do?（）
A
The sequence numbers are checked, and if the LSA is val id it is entered into the topology database.
B
The LSA is placed in the topological database and an acknowledgement is sent to the transmitting router.
C
The LSA is dropped and a message is sent to the transmitting router.
D
The LSA is flooded imme diately out of all the OSPF interfaces, except the interface from which the LSA was received.
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