单项选择题
Which type of hop in an ERO must be directly connected to the previous hop?（）
A.full B.strict C.loose D.partial
多项选择题 An RSVP session is maintained with the periodic exchange of which two message types?（） (Choose two.)
单项选择题 How is an RSVP resv message sent back to the ingress router?（）
单项选择题 The traffic engineering extensions to RSVP provide what functionality?（）
