单项选择题
According to RFC 3931，L2TPv3 utilizes the IANA assigned IP protocol ID of（）.
A.121 B.115 C.110 D.101 E.151 F.51
单项选择题 Based on the following output in a router A running LDP， which statement is true？（）
多项选择题 Whichofthefollowingarestepstoconfiguredestination-basedRemoteTriggeredBlackHole（RTBH）filtering？（）
多项选择题 WhichofthefollowingcomparisonofControlPlanePolicing（CoPP）withReceiveACL（Racl）iscorrect？（）
