Sends Rapid Hellos to the restarting router.
Maintains Adjancency with restarting router.
Sends periodic DD packets to the restarting router.
Floods Type 9 LSAs to all routers indicating a restarting event.
第1题：
A. 10
B. 40
C. 30
D. 20
第2题：
In which two ways does the BGP graceful restart capability preserve prefix information during a restart？（）
第3题：
A. The router sends the file debugOSPF (containing hellos sent and LSA updates) to the syslog server.
B. The router traces both OSPF hellos sent and LSA updates, and stores the results in the debugOSPFfile.
C. The router traces both OSPF hellos sent and LSA updates, and sends the results to the syslog process with the debugOSPF facility.
D. The router traces all OSPF operations, stores the results in the debugOSPF file, and marks both hellos sent and LSAupdates in the file with a special flag.
第4题：
A networking device that sends packets to all connections is a:（）
第5题：
What is the OSPF default frequency,in seconds,at which a cisco router sends hello packets on a multi-access network?（）
第6题：
A.10
B.40
C.30
D.20
第7题：
What is the OSPF default frequency,in seconds,at which a cisco router sends hello packets on a multiaccess network?（）
第8题：
A. It sends CSNPs to the restarting router.
B. It periodically sends TLV 211 to the restarting router.
C. It informs other routers in the domain that a router has restarted.
D. It tears down adjacency and sends its entire database after 30 seconds.
第9题：
What is the function of the helper router during a restart event in OSPF?（）
第10题：
A router receives a packet from a neighbor with an MPLS shim header value of 0.What does the router do with this packet?（）