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# System prepended metadata

title: Week 11 - How the internet works

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# Week 11 - How the internet works

### What is a Network

### TCP/IP

IP Address

IPv4 - 0.0.0.0 - 255.255.255.255

4,294,967,296 Addresses

192.168.

127.0.0.1 - local loopback address - localhost

IPv6 `2^128`

FE38:DCE3:124C:C1A2:BA03:6745:EF1C:683D

0000 - FFFF

340,282,366,920,938,463,463,374,607,431,768,211,456
3.4 x 10^38

### DNS - Domain Name Service

TLD = Top Level Domain - .com .org .net .edu .mil .gov .uk .ru .jp 

google.com quansight.com 

DNS settings  Go to this IP address to look up the ip address of this domain name.


### HTTP
HyperText Transfer Protocol

Human Readable

GET / HTTP/1.1


POST /items/ HTTP/1.1
Header1: Blah
Header2: BlahBlah

first_name: Trent
last_name: Oliphant


### Web Services



### Frameworks

- Frontends
    - Javascript
    - Angular
    - Vue / Nuxt
    - React
- Backend