单选题Which routers must be configured with the same authentication string when configuring OSPF authentication？（）Aall routers on a linkBall routers in an areaCall external OSPF peersDall routers in an OSPF domain
单选题
Which routers must be configured with the same authentication string when configuring OSPF authentication？（）
A
all routers on a link
B
all routers in an area
C
all external OSPF peers
D
all routers in an OSPF domain
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