Networks were one of the original purposes of the computer to use for DARPANET in the early days of the computer. 

Here are a list of things  that will be useful for networking things. This leads eventually to the birth of the [internet](obsidian://open?vault=enter&file=Coding%20Tips%20(Classical)%2FTerminal%20Tips%2FGUIs%2FInternet%2FHosting%2FBrowser%20talk%2FAbout%20Browsers) which is a GUI for the terminal-based networking protocols. Here are the list of best [open source  router oeprating systems. ](https://www.networkstraining.com/best-open-source-router-os/)

- [What can I do with  a VPN? ](https://www.technadu.com/what-can-i-do-with-vpn/279463/)
- [OpenVPN](obsidian://open?vault=enter&file=Coding%20Tips%20(Classical)%2FTerminal%20Tips%2FCLI%20Tools%2FNetworking%2FOpenVPN)
- [OpenWRT](obsidian://open?vault=enter&file=Coding%20Tips%20(Classical)%2FTerminal%20Tips%2FCLI%20Tools%2FNetworking%2FOpenWRT)  

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### Traditional Networking
![[Pasted image 20230721173054.png]]


### Software Defined Networking:
![[Pasted image 20230721173106.png]]

The OpenFlow protocol is a foundational solution for building  SDN
- directly  programmable 
- agile
- centrally managed 
- open standards & vendor-neutral


List  of Networking Libraries: 
- [arp-scan](https://github.com/royhills/arp-scan/wiki/arp-scan-User-Guide)-command-line tool for IPv4 host discovery and fingerprinting on local network