2. 计算机
  3. In the fields of physical security and information security，access control is the selective restriction of access to a place or

In the fields of physical security and information security，access control is the selective restriction of access to a place or

admin2017-09-14  76
问题 In the fields of physical security and information security，access control is the selective restriction of access to a place or other resource．The act of accessing may mean consuming，entering，or using．Permission to access a resource is called authorization(授权)．
  An access control mechanism  _______(1)  between a user(or a process executing on behalf of a user)and system resources，such as applications，operating systems，firewalls，routers，files，and databases．The system must first authenticate(验证)a user seeking access．Typically the authentication function determines whether the user is ______(2) to access the system at all．Then the access control function determines if the specific requested access by this user is permitted．A security administrator maintains an authorization database that specifies what type of access to which resources is allowed for this user．The access control function consults this database to determine whether to ______(3)  access．An auditing function monitors and keeps a record of user accesses to system resources．
    In practice，a number of ______(4)  may cooperatively share the access control function．All operating systems have at least a rudimentary(基本的)，and in many cases a quite robust，access control component．Add—on security packages can add to the  __________(5) access control capabilities of the OS．Particular applications or utilities，such as a database management system，also incorporate access control functions．External devices，such as firewalls，can also provide access control services．
(2)
选项 A、denied
B、permitted
C、prohibited
D、rejected
答案B
解析
转载请注明原文地址:https://kaotiyun.com/show/JmTZ777K
本试题收录于： 数据库系统工程师上午基础知识考试题库软考中级分类
0

数据库系统工程师上午基础知识考试

软考中级

相关试题推荐
随机试题
最新回复(0)