单选题PE1 has connections to VPN sites that are served by three remote PE routers. How many LSPs must be established to support 2547bis?（）Aan LSP for each local CE deviceBan LSP for each remote PE deviceCan LSP for each remote CE deviceDan LSP for each CE facing interface
单选题
PE1 has connections to VPN sites that are served by three remote PE routers. How many LSPs 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
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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？（）Aan LSP for each local CE deviceBan LSP for each remote PE deviceCan LSP for each remote CE deviceDan LSP for each CE facing interface
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单选题The old man had three sons, all of____served in the army during the war.AthemBthatCwhichDwhom