单选题PE1 has connections to VPN sites that are served by three remote PE routers. How many LSP’s must be established to support 2547bis？（）A an LSP for each local CE deviceB an LSP for each remote PE deviceC an LSP for each remote CE deviceD an LSP for each
题目
单选题
PE1 has connections to VPN sites that are served by three remote PE routers. How many LSP’s must be established to support 2547bis？（）
A
an LSP for each local CE device
B
an LSP for each remote PE device
C
an LSP for each remote CE device
D
an LSP for each CE facing interface