Chapter 2: Summary

• typical request/reply message exchange:

  • client requests info or service
  • server responds with data, status code

• message formats:

  • headers: fields giving info about data
  • data: info being communicated

Most importantly: learned about protocols

• control vs. data msgs
  • in-based, out-of-band

• centralized vs. decentralized

• stateless vs. stateful

• reliable vs. unreliable msg transfer

• “complexity at network edge”

• security: authentication

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