單項(xiàng)選擇題

When referring to the data structures of a packet, what is the proper term to refer to a single unit of TCP data at the transport layer?當(dāng)提及一個(gè)數(shù)據(jù)包結(jié)構(gòu)時(shí)，以下哪項(xiàng)可以表示一個(gè)TCP包在傳輸層的單個(gè)數(shù)據(jù)單元？（）

A.TCP segment.TCP段
B.TCP packet.TCP包
C.TCP frame.TCP幀
D.TCP datagram.TCP報(bào)文

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