“LSR”是“Label Switch Router”的缩写，意思是“标记交换

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“TDP”是“Tag Distribution Protocol”的缩写，意思是“标

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“L2TP”是“Layer 2 Tunneling Protocol”的缩写，意思是“

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“L2TPv3”是“Layer 2 Tunneling Protocol version 3”的

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“L2TPv3”是“Layer 2 Tunneling Protocol version 3”的

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“PPTP”是“Point-to-Point Tunneling Protocol”的缩写，

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“MPPE”是“Microsoft Point-to-Point Encryption”的缩

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“VPWS”是“Virtual Private Wire Service”的缩写，意思

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“VPWS”是“Virtual Private Wire Service”的缩写，意思

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“IPSL”是“Internet Protocol-only private LAN (Local

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