虚拟存储技术的基本思想是利用大容量的外存来扩充内存，产生一个比实际内存大得多的虚拟内存空间。引入它的前提是(19)。

Ⅰ．程序局部性原理

Ⅱ．时间局部性原理

Ⅲ．空间局部性原理

Ⅳ．数据局部性原理

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When　you　are(71)a　home　or　small　office　network,　it　is　recommended　that　you　use　the　Network　Setup　Wizard　in　Windows　XP　Home　Edition　to　enable　Internet　Connection　Sharing.　The　Network　Setup　Wizard　automatically　provides　all　of　the　network　settings　you　need　to(72)one　Internet　connection　with　all　the　computers　in　your　network.

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In(66)the　strength　of　the　carrier　signal　is　varied　to　represent　binary　1　or　0.(67)is　a　system　that　can　map　a　name　to　an　address　and　conversely　an　address　to　al　name.(68)is　a　three-way　handshaking　authentication　protocol　that　it's　packets　are　encapsulated　in　the　point-to-point　protocol.(69)is　an　approach　that　enables　an　ATM　switch　to　behave　like　a　LAN　switch.(70)is　an　guided　media　which　is　made　of　glass　or　plastic　and　transmits　signals　in　the　form.　of　light.

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