题目内容

In the function model of access network defined in ITU-T G.982, there are five successive building blocks in the user data plane, which are______________, ______________, ______________, ______________, ________________.

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TreetopologyisusedinPONsystem,whichiscomprisedof______________,______________,______________.

In SDN, there are two planes: ______________plane is responsible for processing and delivery of packets with local forwarding state;______________plane is responsible for computing the state in routers (forwarding state).

In software defined networking, there is the physical separation of the network _______ plane from the _______ plane, and where a control plane controls several devices.

Please give the full spelling of these terminology abbreviations in access network: TE, CPN, UNI, SNI.

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