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Full Stack Web Development using MERN Stack 02

* Some important terms
1. Network (resources connected in a system is network).
LAN (local area network) eg (connected in a house)
MAN(Metropolitan Area Network) eg (cities interconnected)
WAN(wide area network) eg (countries interconnected)
->can be wired and wireless, can resource sharing and can communicate.

2. Internet (global system, it is a network of networks). Billions of devices interconnected
3. www (world wide web) subset of internet
4. IP address (unique identification of a machine). If 2 devices wants to communicate with each other, they must know the ip address in order to pass data or resources
5. Browser (doc, resources, website) can be access using browser
Browser engine: chrome, safari, fire-fox, to run/render web application. WebKit is a browser engine by apple behind all other engine
6. client/serve model (request and response over a network). type of request get(fetching data), post(take this data).
client eg. laptop, pc, mobile, browser, terminal can make request to serve
server eg. file server, application and web server, database server

Dns server change domain name to ip address
Dnr Domain name resolution
     
 
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