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（）

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（）

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（）