VLAN的主要作用不包括( )。
- A.加强网络安全
- B.抑制广播风暴
- C.简化网络管理
- D.查杀病毒
正确答案及解析
正确答案
解析
本题考查计算机网络基础知识。
VLAN的好处主要有:
(1)端口的分隔。即便在同一个交换机上,处于不同VLAN的端口也是不能通信的。这样一个物理的交换机可以当作多个逻辑的交换机使用。
(2)网络的安全。不同VLAN不能直接通信,杜绝了广播信息的不安全性。
(3)灵活的管理。更改用户所属的网络不必换端口和连线,只更改软件配置就可以了。不能查杀病毒。
根据题干分析,可得本题选D。
较为常见的考试关于类似防火墙的功能有:
(1)保护易受攻击的服务
(2)控制对特殊站点的访问
(3)集中化的安全管理
(4)对网络访问进行记录和统计
不能实现的功能有:
(1)限制有用的网络服务
(2)不能防范内部网络用户的攻击
(3)不能完全防范病毒
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