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Web app security - best practices:
- Regular patching & updates
- Least privilege
- Secure code
- Secure data storage
- MFA
- Logging & monitoring
- User training
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HTTP - stateless request-response protocol; common HTTP methods include GET, POST, PUT and DELETE
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HTTP response codes:
- 1xx - Informational
- 2xx - Successful
- 3xx - Redirection
- 4xx - Client errors
- 5xx - Server errors