● 下列网络互连设备中，属于物理层的是 （70） 。

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• 1● 下面选项中，不属于HTTP客户端的是 （69） 。

  A.IE

  B.Netscape

  C.Mozilla

  D.Apache

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• 2● 某网站向CA申请了数字证书，用户通过 （68） 来验证网站的真伪。

  A.CA的签名

  B.证书中的公钥

  C.网站的私钥

  D.用户的公钥

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• 3● 包过滤防火墙对数据包的过滤依据不包括 （67） 。

  A.源IP地址

  B.源端口号

  C.MAC地址

  D.目的IP地址

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• 4● 网络安全体系设计可从物理线路安全、网络安全、系统安全、应用安全等方面来进行。其中，数据库容灾属于 （66） 。

  A.物理线路安全和网络安全

  B.物理线路安全和应用安全

  C.系统安全和网络安全

  D.系统安全和应用安全

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• 5● 为IT服务定价是计费管理的关键问题，“IT服务价格=IT服务成本+X%”属于（65） 。

  A.价值定价法

  B.成本定价法

  C.现行价格法

  D.市场价格法

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• 6● Why is  （71） fun、 What delights may its practitioner expect as his reward、 First is thesheer joy of making things. As the child delights in his mud pie, so the adult enjoys buildingthings, especially things of his own design. Second is the pleasure of making things that areuseful to other people. Third is the fascination of fashioning complex puzzle-like objects ofinterlocking moving  parts  and watching them work  in subtle  cycles,  playing  out  theconsequences of principles built in from the beginning. Fourth is the joy of always learning,which springs from the  （72）  nature of the task. In one way or another the problem is evernew, and its solver learns something: sometimes  （73） , sometimes theoretical, and sometimesboth. Finally, there is the delight of working in such a tractable medium. The  （74） , like thepoet, works only slightly removed from pure thought-stuff. Few media of creation are so flexible,so easy to polish and rework, so readily capable of realizing grand conceptual structures.    Yet the program  （75） , unlike the poet's words, is real in the sense that it moves andworks, producing visible outputs separate from the construct itself. It prints results, drawspictures, produces sounds, moves arms. Programming then is fun because it gratifies creativelongings built deep within us and delights sensibilities we have in common with all men.

  A.programming

  B.composing

  C.working

  D.writing

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