05. UDP, TCP, IP and Layering

Full playlist: https://www.youtube.com/watch?v=dI0no0zJGJs&list=PLdTgpAz0qq7iollff0Yk_v-1qKosrIFkO

Teb describes the concept of network layering in the specific context of DNS/UDP/IP and HTTP/TCP/IP, and describes how that layering affects data as it travels across the internet.

Additional Resources:

This RFC describes the DNS data format, and a lot of other things about DNS: https://www.ietf.org/rfc/rfc1035.txt

Lifewire gives a decent high level description of the differences between a switch (layer 2/link layer) and a router (layer 3/network layer): https://www.lifewire.com/differences-between-routers-switches-and-hubs-817707

This Quora answer provides some high level insight into the differences between UDP and TCP and why DNS uses UDP while HTTP uses TCP: https://www.quora.com/Does-HTTP-use-TCP-or-UDP-Why

If you really want to dive into the details of the network layers, I highly recommend downloading Wireshark and working through these Wireshark exercises from the book Networking: A Top Down Approach: https://www-net.cs.umass.edu/wireshark-labs/

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Видео 05. UDP, TCP, IP and Layering канала Teb's Lab