Below the socket layer is the protocol layer, which contains the actual implementation of the protocol (in this case, TCP).

套接字层下面是协议层，该层包含协议的实际实现(本例中为TCP)。

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The Implementation Layer also performs segmentation and concatenation of messages for the underlying protocol.

实现层还执行用于底层协议的消息分段和并置。

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For protocol testing, you don't describe the structure of the implementation, but rather, in black-box style, how a sender and a receiver communicate.

在对协议进行测试时，你不必描述协议实现的结构，但是如果采取黑盒方式，则需要描述发送者与接收者之间的通信方式。

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In a statement the Council said it "notes with deep regret that Turkey, despite repeated calls, continues refusing to fulfil its obligation of full, non-discriminatory implementation of the Additional Protocol" - a reference to the Turkish boycott of customs arrangements with Cyprus.

BBC: Cyprus begins EU presidency amid cash woes

The course - which connects perfectly to the implementation of the Protocol - aims to train local experts from the Sava River Basin, involved in sediment management.

UNESCO: OFFICE IN VENICE

It also establishes a 12 member Intergovernmental Committee to oversee the implementation of the Second Protocol and de facto the Convention.

UNESCO: UK National Commission for UNESCO :: Convention for the Protection of Cultural Property in the Event of Armed Conflict (1954)