多项选择题 Which two are default preference values for both internal and external IS-IS Level 2 routes on a Juniper Networks router?（）

单项选择题 Which attribute can influence inbound traffic flows from a neighboring AS?（）

单项选择题 PE1 has connections to VPN sites that are served by three remote PE routers. How many LSPs must be established to support 2547bis?（）