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khattab88/cs50 understanding tech (2- internet).txt

Last active August 29, 2019 05:05
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cs50 understanding tech (2- internet).txt
- we can connect to intenet using DSL modem, which is connectd through ISP (internet service provider).
- we can use home Router to brodcast wi-fi signal around the area.
- every computer on the network (ex: internet) must has an IP address
- ISP can provide a unique IP address using DHCP server (Dynamic Host Configuration Protocol)
- inside home area (within wi-fi network) your router could assign IP addresses to multiple devices (labtops, phones, ...)
- DNS servers (Domain Name System) maps an IP address of a website (which is running on some machine on the internet)
into human-readable names (like facebook.com, ....)
- computers can communicate with each other on the internet by sending and receiving packets
- TCP (Transmission Control Protocol) is used for sending/receiving packets in a reliable way
- internet using TCP/IP stack for communication
- HTTP is the web protocol (using port 80 by default or 443 for secure communication)
- you can use a tool callled traceroute to trace your http request (passing by many hobs/routers to destination)
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