计算机通信毕业论文：企业网远程接入技术.doc

企业网远程接入技术 姓 名： X X 学 号： XXXXXXX 专业名称：计算机通信 指导老师：XX XXX 摘 要 随着企业的信息化建设电子商务的广泛开展，远途的通信在企业，伙伴，分支机构和移动使用者之间已成为必要的商业关系。但是远程连接存在着安全和费用的问题。早期为了安全，在网络间使用点对点专线连接。然而这种固定与昂贵成本的方式妨碍了它的普及使用。私有网络是利用一些公用网络的部份，称为虚拟私有网络或VPN。VPN的英文全称是“ Private Network”，翻译过来就是“”。顾名思义，虚拟专用网络可以把它理解成是虚拟出来的企业内部专线。 virtual private network “VPN” redirects here. For other uses, see VPN (disambiguation). A virtual private network (VPN) is a private communications network often used by companies or organizations, to communicate confidentially over a public network. VPN traffic can be carried over a public networking infrastructure (e.g. the Internet) on top of standard protocols, or over a service providers private network with a defined Service Level Agreement (SLA) between the VPN customer and the VPN service provider. A VPN can send data e.g. voice, data or video, or a combination of these media, across secured and encrypted private channels between two points. VPN can be a cost effective and secure way for different corporations to provide users access to the corporate network and for remote networks to communicate with each other across the Internet. VPN connections are more cost-effective than dedicated private lines; usually a VPN involves 2 parts: the protected or inside network, which provides physical and administrative security to protect the transmission; and a less trustworthy, outside network or segment (usually through the Internet). Generally, a firewall sits between a remote users workstation or client and the host network or server. As the users client establishes the communication with the firewall, the client may pass authentication data to an authentication service inside the perimeter. A known trusted person, sometimes only when using trusted devices, can be provided with appropriate security privileges to access resources not available to general users. Keywords: VPN，