What is the best resource for understanding computer network protocols?

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brushman
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So I'm working on this project that's way over my head. At this point I'm just messing around because it's pretty hopeless. None the less, I'm still fiddling.

Basically I'm trying to create a "bot" that plays cafe world (facebook game), by programing a client that mimics outgoing messages to the cafe world server. To do this I'm using Wireshark to measure incoming and outgoing packets.

...but I have no idea how to read these packets. I don't know what anything means, or how I should go about learning how to figure out what these packets mean.

When I click on a packet it gives me tons of information in categories like "Frame 10", "Ethernet II", "Internet Protocol", "User Datagram Protocol", "Hypertext Transfer Protocol", etc.

What is all this stuff and where can I learn about it?
 
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