单项选择题
Where are Level 2 LSPs flooded?（）
A.A B.B C.C D.D
What are three purposes of a PSNP?（）
A.A B.B C.C D.D E.E
When configuring OSPF on the ERX, what is the default auto-cost reference-bandwidth value?（）
Which CLI command is used to display BGP-learned routes that are now in the OSPF link-state database?（）
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