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? （）

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

多项选择题What are three examples of a CPE-provisioned VPN? （）

A.L2TP
B.2547bis
C.L2F
D.PPTP
E.MPLS

单项选择题Click the Exhibit button. Referring to the exhibit, which statement is true about the IP packet flow through interface ge-3 0 0.0?（）

A. All packets set to be forwarded out interface ge-3/0/0 will be dropped by the firewall filter fire1.
B. All packets set to be forwarded out interface ge-3/0/0 will NOT dropped by the firewall filter fire1.
C. All packets entering the router on interface ge-3/0/0.0 will be dropped by the firewall filter fire1.
D. All packets set to be forwarded out interface ge-3/0/0, except those sourced locally by the Routing Engine, will be dropped by the firewall filter fire1.

单项选择题Given the following LSP configuration, which statement is true? （）

A. The router will use path1 when it is available and stable.
B. The router will use path3 when it is available and stable.
C. The router will attempt to establish path2 only when path1 and path3 are down.
D. The router will attempt to establish path1 only when path2 and path3 are down.