单项选择题
A. until the hello dead timer expires
B. until the restart duration timer expires
C. until the restarting router sets the down bit
D. until the restart helper sends out three CSNPs
单项选择题 A router receives an IPv6 packet which is 2000 bytes in length. The MTU of the outgoing interface is 1500 bytes. Which action will the router take?（）
多项选择题 Which two MBGP IPv4 sub-AFIs does the JUNOS software support?（）
单项选择题 Which routers must be configured with the same authentication string when configuring OSPFauthentication?（）