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

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单项选择题

Which multicast mode does Auto-RP require?（）

A. Link-mode
B. Dense mode
C. Sparse mode
D. Sparse-dense mode

多项选择题

Which three mechanisims support the forwarding plane of a Layer 3 VPN in JUNOS software? （）

A. MPLS LSP
B. ATM tunnel
C. GRE tunnel
D. IPSEC tunnel
E. L2TPv3 session

单项选择题

What is the primary purpose of VPLS?（）

A. to create a partial mesh of VPN sites
B. to remove MPLS from VPNs
C. to create a point to multipoint topology
D. to enable IPsec accross the VPN