依据《行政处罚法》的规定，违法事实确凿并有法定依据，对法人或者其他组织处以()元以下罚款或者警告的行政处罚的，执法人员可以当场作出行政处罚决定。

A.1000

B.1500

C.2000

D.5000

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.

so it is up to TCP to time out and （） them as need be.

A．reassemble

B．reduce

C．re-create

D．retransmit