云是指你作为接受服务的对象,是云端,不管你在何时何地,都能享受云计算提供的服务。云是网络、互联网的一种比喻说法。
云分为私有云、公有云、混合云及行业云等等。云在勾画网络拓扑或网络结构时常见,过去在图中往往用云来表示电信网,后来也用来表示互联网和底层基础设施的抽象。
1云计算
狭义云计算指IT基础设施的交互和使用模式,指通过网络以按需、易扩展的方式获得所需资源;广义云计算指服务的交互和使用模式,指通过网络以按需、易扩展的方式获得所需服务。这种服务可以是IT和软件、互联网相关,也可是其他服务。它意味着计算能力也可作为一种商品通过互联网进行流通。如云计算、云阅读、云搜索、云引擎、云服务、云网站、云盘、云站中国等。
云及虚拟化正在动摇着企业的基础设施的根基。云所带来的新的计算模式改变了存储和处理。CIO正在考虑网络虚拟化,不仅仅是VPN,这还包含着将网络服务从底层物理硬件中解耦的机遇。由于许多公司在选择混合型的云环境,IT正在评估内部解决方案和外部解决方案各自的优势所在。云服务为新的应用提供了一个测试和开发环境,并为新的软件创新及新定价和SaaS的分发模式打开了闸门。一方面,移动-社交-云通过允许员工随地访问企业数据给企业赋予了能力,并以更好的社会协作工具改进了沟通。另一方面,IT又不堪安全、合规性及快速变化的重负。因此,虚拟化战略以及对企业进行和移动化成为IT2012年关心的话题也就不足为奇了。实际上,超过60%的受访企业将其列为优先考虑事宜。
2移动云
移动云是专为移动互联网应用服务的云平台,是移动应用从单机版本向联网版本发展的产物。移动云专注于同时需要云和端的移动应用,比如社交类和同步类应用。国内也有不少大公司推出移动云平台,但从云平台的成熟度,云服务的多样性,对社交网络的开放性等方面来看,都差强人意。
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