单项选择题
Which Behavior Aggregate (BA) is used to classify traffic arriving on an LSP?（）
A. EXP B. DSCP C. 802.1P D. inet-precedence
单项选择题 Which mechanism does External BGP use to prevent the formation of routing loops?（）
单项选择题 By default, which JUNOS software routing table contains IPv6 unicast routes?（）
单项选择题 What is the purpose of IS-IS level boundaries?（）
