单项选择题
A. Sends Rapid Hellos to the restarting router.
B. Maintains Adjancency with restarting router.
C. Sends periodic DD packets to the restarting router.
D. Floods Type 9 LSAs to all routers indicating a restarting event.
单项选择题 In JUNOS software, which would prevent an OSPF router from importing the 10.0.0.4/30 summaryroute?（）
单项选择题 A successful authentication attempt by a RADIUS server does not supply a username to the JUNOSsoftware. Which username is used by default?（）
多项选择题 What are three TLVs that support IS-IS extensions for traffic engineering?（）