多项选择题
What are three RSVP messages?（）
A. PathErr : Path error B. ResvErr : Reservation error C. PathConfTear : Path confirmation teardown D. ResvConf : Reservation confirmation E. ResvConfTear : Reservation confirmation teardown
单项选择题 Which multicast mode does Auto-RP require?（）
多项选择题 Which three mechanisims support the forwarding plane of a Layer 3 VPN in JUNOS software? （）
单项选择题 What is the primary purpose of VPLS?（）
