下面有关VLAN的语句中，正确的是()。
- A.虚拟局域网中继协议VTP(VLAN Trunk Protocol)用于在路由器之间交换不同VLAN的信息
- B.为了抑制广播风暴，不同的VLAN之间必须用网桥分隔
- C.交换机的初始状态是工作在VTP服务器模式，这样可以把配置信息广播给其他交换机
- D.一台计算机可以属于多个VLAN，即它可以访问多个VLAN，也可以被多个VLAN访问
正确答案及解析
正确答案
解析
用VTP设置和管理整个域内的VLAN，在管理域内VTP自动发布配置信息，其范围包括所有TRUNK连接，如交换互连(ISL)，802．10和ATM LAN(LANE)。当交换机加电时，它会周期性地送出VTP配置请求，直至接到近邻的配置(Summary)广播信息，从而进行结构配置必要的更新。VTP有3种工作模式，即服务器模式、客户模式和透明模式，其中服务器模式可以设置VLAN信息，服务器会自动将这些信息广播到网上其他交换机以统一配置：客户模式下交换机不能配置VLAN信息，只能被动接受服务器的VLAN配置：而透明模式下是独立配置。它可以配置VLAN信息，但是不广播自己的VLAN信息，同时它接收到服务器发来的VLAN信息后并不使用，而是直接转发给别的交换机。交换机的初始状态是工作在服务器模式有一个默认的VLAN，所有的端口都属于这个VLAN内。为了抑制广播风暴，不同的VLAN之间必须用路由器分隔。一台计算机完全可以属于多个VLAN。
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