求翻译：在本设计中，利用了二层交换机的虚拟局域网配置来实现不同部门之间的隔离；对三层交换机配置病毒扫描进来行监控；通过使用地址转换技术来弥补公有IP地址的不足； 由访问控制列表来完成报文的过滤；利用通用路由封装协议来完成企业总部和分支机构之间的连接；应用单播反向路径检测技术来控制单播流量；最后对DOS攻击和ARP攻击的防范进行了研究是什么意思？

In this design, the use of the L2 switch VLAN configuration to achieve the isolation between different departments; configuration of three switches control the virus scan incoming line; through the use of address translation techniques to compensate for the lack of public IP addresses; by the access

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In this design, used two switchboard virtual local area network dispositions to realize between the different department's isolation; Scans a line of monitoring to three switchboard disposition virus; Makes up the public IP address through the use address translation technology the insufficiency; Co

In this design in the, using has II layer switch of virtual LAN configuration to implementation different sector Zhijian of isolation; on three layer switch configuration virus scan came in line monitoring; through using address conversion technology to make up for the public domain IP address of in

In this design, the use of the L2 switch VLAN configuration to achieve the isolation between different departments; configuration of three switches control the virus scan incoming line; through the use of address translation techniques to compensate for the lack of public IP addresses; by the access