| Glossary（名词） | Definition（定义） |
| Availability Set 可用性组 | refers to two or more Virtual Machines deployed across different Fault Domains to avoid a single point of failure. 指为避免单点故障而在不同故障域部署的两台或更多虚拟机。 |
| Cloud Services 云计算服务 | refers to a set of compute resources utilized for Web and Worker Roles. 指用于 Web 角色和 Worker 角色的一套计算资源。 |
| Web Role Web 角色 | is a Cloud Services component run in the Windows Azure execution environment that is customized for web application programming as supported by IIS and ASP.NET. 指在 Windows Azure 执行环境中运行的云计算服务组件，它针对 Web 应用程序编程而定制，受 IIS 和 ASP.NET 支持。 |
| Worker Role Worker 角色 | is a Cloud Services component run in the Windows Azure execution environment that is useful for generalized development, and may perform background processing for a Web Role. 指在 Windows Azure 执行环境中运行的云计算服务组件，它对于一般性的开发很有用，并可能为 Web 角色执行后台处理任务。 |
| External Connectivity 外部连通性 | is bi-directional network traffic over supported protocols such as UDP and TCP that can be sent and received from a public IP address. 指可使用支持的协议（如 UDP 和 TCP）通过公共 IP 地址发送和接收的双向网络流量。 |
| Fault Domain 故障域 | is a collection of servers that share common resources such as power and network connectivity. 指共享公共资源（如电源和网络连接）的一组服务器。 |
| Update Domain 更新域 | refers to a set of Windows Azure instances to which platform updates are concurrently applied. 指一组 Windows Azure 实例，将同时对这些实例应用平台更新。 |
| Service/Services 服务 | refers to the Windows Azure Cloud Services, Virtual Machines, and Virtual Network provided to Customer pursuant to the Agreement. 指根据协议提供给客户的 Windows Azure 云计算服务、虚拟机和虚拟网络。 |
| Tenant 租户 | represents one or more roles each consisting of one or more role instances that are deployed in a single package. 指一个或多个角色，每个角色由在单个包中部署的一个或多个角色实例组成。 |
| Virtual Machine 虚拟机 | refers to persistent instance types that can be deployed individually or as part of an Availability Set. 指可单独部署或作为可用性组的一部分进行部署的持久化实例类型。 |
| Virtual Network 虚拟网络 | is a service supported by Windows Azure that enables customers to extend their corporate network to the cloud. The Virtual Network service consists of two parts: a VNet and a Virtual Network Gateway. 指 Windows Azure 支持的一项服务，客户能够利用该服务将企业网络扩展到云。虚拟网络服务由两部分组成：VNet 和虚拟网络网关。 |
| Virtual Network Gateway 虚拟网络网关 | refers to a Windows Azure service that facilitates cross-premises connectivity between one Virtual Network and one customer on-premises network over IPsec VPN. 指 Windows Azure 的一项服务，它能够通过 IPsec VPN 提供一个虚拟网络与一个客户本地网络之间的远程连通性。 |
| VNet | refers to a virtual private network consisting of a collection of user-defined IP addresses and subnets that form a network boundary within Windows Azure. VNets support IP addresses as defined in RFC 1918. 指虚拟专用网络，它由一组用户自定义的 IP 地址和子网组成，从而构成 Windows Azure 的网络边界。VNet 支持 RFC 1918 中定义的 IP 地址。 |
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