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?（）

A. Forward the packet.
B. Fragment the packet.
C. Drop the packet silently.
D. Drop the packet and send an ICMPv6 message.

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多项选择题
Which two MBGP IPv4 sub-AFIs does the JUNOS software support?（）

A.unicast
B.anycast
C.multicast
D.broadcast
单项选择题
Which routers must be configured with the same authentication string when configuring OSPFauthentication?（）

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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