CSE 123 Lecture Notes - Lecture 2: Request For Comments, Hypertext Transfer Protocol, Maximum Transmission Unit

• School: UCSD
• Department: Computer Science and Engineering
• Course: CSE 123
• Professor: Alex Snoeren

Document Summary

And each layer above builds on top of it. Iff you can implement the functionality correctly and completely in a lower layer. Take the problem and break it up into chunks. Each layer deals with its own set of problems. However, a layer below cannot depend on the layers above it. Layers can change w/o disturbing other layers (modularity) Interface among peers in a layer is a protocol. Functionality should be implemented as far towards the end as possible unless. Exception: sometimes you can implement in a lower layer way more effectively and it works. Ietf (internet engineering task force) - define protocols that run over the internet. Note: we just focus on the 4-layer model (there are technically 7 layers in the book) Take a small amount of data: payload. Wrap it in larger containers (i. e. more data!) Rough consensus and running code - get enough people to run it!