多项选择题
While troubleshooting some connectivity issues，you issue the “show ip ospf database”in order to ex amine the link state database. Which three of the statements below are true regarding the OSPF link state database（）
A.Each router has an identical link state database.
B.External routes are imported into a separate link state database.
C.Syn chronization of link state databases is maintained via floodingo f LSAs.
D.Information in the link state database is used to build a routing table by calculating a shortest-path tree.
E.By default,link state databases are refreshede very 10 minutes in the absence of topology changes.
相关考题
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单项选择题
Part of the routing table of router PG1 is displayed below: From analyzing the above command output,what is the administrative distance of the external EIGRP routes（）
A.24
B.32
C.90
D.170
E.27316
F.None of the other alternatives apply -
多项选择题
EIGRP is being used as the routing protocol on the PassGuide network. Whiletroubleshooting some network connectivity issues，you notice a large number of EIGRP SIA（StuckinActive）messages. What causes these SIA routes（）
A.The neighboring router stops receiving ACK packets from this router.
B.The neighboring router starts receiving route updates from this router.
C.The neighboring router is too busy to answer the query(generally caused by high CPU utilization).
D.The neighboring router is having memory problems and cannot allocate the memory to process the query or build the reply packet. -
单项选择题
At which lay er of the OSI model does the Spanning Tree Protocol (STP) operate at（）
A.Lay er 5
B.Lay er 4
C.Lay er 3
D.Lay er 2
E.Lay er 1
