本帖最后由 yanzijiangjun 于 2012-6-8 18:23 编辑
各位大侠,小弟今日在翻阅CCNA学习指南(英文第六版)时,发现第115页有如下描述:
TCP is a full-duplex, connection-oriented, reliable, and accurate protocol, but establishing all these terms and conditions, in addition to error checking, is no small task. TCP is very complicated and, not surprisingly, costly in terms of network overhead. And since today’s networks are much more reliable than those of yore, this added reliability is often unnecessary. 请问书中所述的“TCP是full duplex的..."怎么理解?谢谢!
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