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问题 名词解释

外部排序

答案

参考答案：

指的是待排序记录的数量很大，以致内存一次不能容纳全部记录，在排序过程中对外存进行访问的排序过程。

填空题

足内翻或外翻畸形多见于（）及（）。
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单项选择题

TCP functions at the Open System Interconnection (OSI) (61) layer, or Layer 4. Its chief responsibility is to ensure (62) end-to-end connectivity. IP, located one layer down, at the OSI network layer, or Layer 3, communicates the addresses of each (63) sender and receiver to the routers along the way. Routers and Layer 3 switches can read IP and other Layer 3 (64) . This information, combined with routing tables and other network intelligence, is all it takes to get (65) the room or around the world via TCP/IP.

A．flexible

B．reliable

C．easy

D．simple
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