求翻译：虚拟局域网VLAN技术最初是为了解决以太网中的广播问题和安全性而提出的，它在原有以太网帧前面增加了VLAN字头（即VLAN数据字段），指明发送这个帧的工作站是属于哪一个VLAN。其优点是可以控制广播风暴、提高网络整体的安全性、 解决了主干网内网络站节点的增加、删除、移动等操作，方便网络管理者动态分类管理网络。是什么意思？

Vlan Virtual LAN technology, Ethernet was originally broadcast in order to solve security issues and put forward, it added in front of the original Ethernet frame vlan prefix (ie vlan data fields), specified workstation is sending the frame which belongs to a vlan. The advantage is you can control b

The virtual local area network VLAN technology is at first in order to solve, it which in the ethernet broadcast question and the security proposed in front of the original ethernet frame increased the VLAN prefix (i.e. VLAN data field), which VLAN the indication transmits this frame the workstation

VLAN virtual local area network technology is initially broadcasting to resolve Ethernet and security arising out of the question, it in front of the original Ethernet frames increases the VLAN-prefix (namely VLAN data fields), the workstation sends the specified frame which is belong to a VLAN. Its