单项选择题
How does an IPv6 router deal with a packet that is larger than the outgoing interface MTU？（）
A.It will fragment the packet at Layer 2. B.It will fragment the packet at Layer 3. C.It will drop the packet and send an ICMPv6 message "packet too big" back to the source. D.It will drop the packet.
单项选择题 WhatistheCiscoIOScommandtoturnonexplicitnullforwardingbyLDP？（）
单项选择题 YouuseOSPFasyournetworkroutingprotocol.YouusethecommandshowiprouteandyouseeseveralroutesdescribedasO，OIA，OE1，andOE2.Whatroutesareinyourarea？（）
单项选择题 WhichinformationwilltheCiscoIOScommandshowipospfribdisplay？（）
