What is the function of the helper router during a restart event in OSPF?()
第1题:
Refer to the exhibit. OSPF is configured on all routers in the network. Area 5 is configured as an NSSA areA. The RIPv2 routes are redistributed into the OSPF domain on router R5. What two types of LSAs will be originated by router R5?()
A. type 1 Router LSA
B. type 2 Network LSA
C. type 3 Network Summary LSA
D. type 4 ASBR Summary LSA
E. type 5 AS External LSA
F. type 7 NSSA External LSA
第2题:
A. It routes all traffic that is addresses to the destination network to the interface indicates in the routing table.
B. It sends a copy of its neighbor table to all adjacent routers.
C. It sends a multicast query packet to all adjacent neighbors requesting available routing paths to the destination network.
D. It broadcasts Hello packets to all routers in the network to re-establish neighbor adjacencies.
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:
What is the OSPF default frequency,in seconds,at which a cisco router sends hello packets on a multiaccess network?()
第5题:
A.10
B.40
C.30
D.20
第6题:
A. All OSPF routers in stubby areas can have type 3 LSAs in their database.
B. All OSPF routers in stubby areas can have type 7 LSAs in their database.
C. All OSPF routers in totally stubby areas can have type 3 LSAs in their database.
D. All OSPF routers in totally stubby areas can have type 7 LSAs in their database.
E. All OSPF routers in NSSA areas can have type 3 LSAs in their database.
F. All OSPF routers in NSSA areas can have type 7 LSAs in their database.
第7题:
A. 10
B. 40
C. 30
D. 20
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:
In which two ways does the BGP graceful restart capability preserve prefix information during a restart?()
第10题:
What is the OSPF default frequency,in seconds,at which a cisco router sends hello packets on a multi-access network?()