单项选择题
What is required to enable the use of metrics larger than 63 for traffic engineering in IS-IS？（）
A.Nothing， wide metrics are used by default in IS-IS B.Enable wide-metrics-only under protocol IS-IS C.Enable traffic-engineering under protocols IS-IS D.Disable TVL’s 2 and 128 which carry the 6-bit metrics （0-63）.
单项选择题 WhichisastepintheJUNOSsoftwareCSPFalgorithm？（）
多项选择题 WhatarethreeRSVPmessages？（）
单项选择题 WhatistheoptimizetimeronanRSVP-signaledLabel-SwitchedPath（LSP）？（）
