Each machine supporting TCP has a TCP transport entity, either a library procedure, a user process, or part of the kernel. In all case, it manages TCP streams and （） to the IP layer.A TCP （） accepts user data streams from local process, breaks them into pieces not exceeding 64KB, and sends each piece as a separate IP （） . When datagrams containing TCP data arrive at a machine, they are given to the TCP entity,which reconstructs the original byte streams. The IP layer gives no guarantee that datagrams will be delivered properly, so it is up to TCP to time out and （） them as need be. Datagrams do arrive may well do so in the wrong order, it is also up to TCP to （） them into messages in the proper sequence.

In all case, it manages TCP streams and （） to the IP layer.

A．calls

B．interfaces

C．links

D．produces

指出乙方对上述哪些事件可以向厂方要求索赔，哪些事件不可以要求索赔，并说明原因。 2．每项事件工期索赔各是多少天总计工期索赔是多少天 3．假设人工费单价为23元/工日，因增加用工所需的管理费为增加人工费的30%，则合理的费用索赔总额是多少