Cloud guide DNS, knowledge popularization and classroom notes

1、DNS(Domain Name System, The domain name system ): The only address IP. The domain name and IP Address mapping

2、 The client sends a request to DNS The server , Get according to the domain name IP Address . The client will then according to IP The address corresponds to IP The server sends the request , After receiving the request, the server returns data to the client .

adopt DNS The mapping of IP Connect

3、 Cloud related neighborhood vocabulary ：

LaaS Infrastructure as a service (Infrastructure As A Service)

PaaS(Plat As A Service)

SaaS(Software As A Service)

4、 The cloud is a huge pool of resources , You can buy... On demand ; Clouds can be like water and electricity , The utility calculation is realized in the way of gas .

Users do not need to care about the generation and transmission of electricity , Professionals are responsible ; Pay per user . Access interface （ Socket ） Uniform specifications , And easy to get in daily life .

5、 Computer core configuration ： The resolution of the 、CPU Ability to calculate , Memory disk 、 Electric quantity .

GPU: The graphics card

PDA： Handheld computer （Personal Digital Assistant）

6、NIST: National Institute of standards and Technology

National Institute of Standards and Technology

7、NAS Network attached storage (Network Attached Storage)

8、 Guiyang Dalian special line : Ten thousand trillion

9、 Cloud deployment : Public cloud ( Small and medium-sized enterprises are suitable for )、 Private cloud 、 A hybrid cloud .