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云导DNS和知识科普以及课堂笔记
2022-07-06 00:24:00 【南风~古草】
1、DNS(Domain Name System,域名系统):唯一的地址IP。域名与IP地址进行对应映射
2、客户端发送请求给DNS服务器,根据域名拿到IP地址。客户端再根据IP地址向对应IP服务器发送请求,服务器接收请求后返回数据给客户端。
通过DNS的映射可把IP连接起来
3、云相关邻域词汇:
LaaS基础设施即服务(Infrastructure As A Service)
PaaS(Plat As A Service)
SaaS(Software As A Service)
4、云是一个庞大的资源池,可以按需购买;云可以像自来水电,煤气那样实现效用计算。
使用者无需关心电的产生与传输,而由专业人员负责;按照用户付费。访问接口(插座)规格统一,且在日常生活中容易获得。
5、电脑核心配置:分辨率、CPU计算能力,内存磁盘、电量。
GPU:显卡
PDA:掌上电脑(Personal Digital Assistant)
6、NIST:国家标准和技术研究院
National Institute of Standards and Technology
7、NAS网络附属存储(Network Attached Storage)
8、贵大专线:万兆
9、云部署:公有云(中小企业适用)、私有云、混合云。
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