防火墙是一种常用的网络安全装置，它可以(59)。有多种实现防火墙的技术，如包过滤、代理服务器、双穴主机和屏蔽子网网关等，相对来说(60)功能较弱但实现也较简单。Internet的电子邮件、文件传输或Web访问总分别采用了(61)、FTP和(62)等协议。
- A．防止内部人员的攻击
- B．防止内部人员对外部的非法访问
- C．防止外部人员的攻击
- D．既防止外部人员的攻击，又防止内部人员对外部的非法访问
-
(79)
- A．gives
- B．distinguishes
- C．has
- D．difference
-
(78)
- A．conducted
- B．increased
- C．reduced
- D．deducted
-
(77)
- A．general
- B．common
- C．typical
- D．special
-
(75)
- A．exam
- B．test
- C．reference
- D．specialize
-
(76)
- A．process
- B．procedure
- C．model
- D．project
-
(73)
- A．give
- B．above
- C．presented
- D．got
-
(74)
- A．of
- B．in
- C．to
- D．with
-
(72)
- A．Existing
- B．the
- C．fact
- D．Company
-
(71)
- A．lack
- B．since
- C．big
- D．lot
-
Due to a constantly(66) environment, a poor understanding of the user's needs and preferences, as well as a(67) of willingness to modify.(68) organizational structures and decision models, the full economic potential of Web Information Systems (WIS) has not been realized by now. The data object types of the(69) meta. model, the Extended World Wide Web Design Technique (eW3DT), provide hypertext designers(70) a conceptual, user-centric framework and graphical notation for the construction of both,(71) and customized models, during the software development(72) of commercial WIS. A reference model as a normative concept represents an abstraction of a(73) company, its functional units, or its Web Information System and is intended to streamline the design and implementation of complex applications at(74) costs. As precondition for pursuing a partial globalization strategy,eW3DT(75) between technical and content-specific responsibilities for designing, implementing, and maintaining WIS.
- A．modify
- B．changing
- C．modifying
- D．changed
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