# Unit 6 · HTTP, DNS, FTP and SMTP

Subject: Computer Networks

Exam: TEE

Reader: https://deep-learning-study-room.vercel.app/cn/#tee/read/applications

Canonical: https://deep-learning-study-room.vercel.app/read/cn/tee/read-chapter/applications/

TEE · Unit 6 · current syllabus 702AI0C023

1. [WWW and the complete HTTP request journey](https://deep-learning-study-room.vercel.app/read/cn/tee/read/applications--http/)
2. [HTTP methods, status, persistence and HTTPS](https://deep-learning-study-room.vercel.app/read/cn/tee/read/applications--http-state/)
3. [DNS hierarchy, delegation and uniqueness](https://deep-learning-study-room.vercel.app/read/cn/tee/read/applications--dns/)
4. [DNS records, recursive/iterative queries and caching](https://deep-learning-study-room.vercel.app/read/cn/tee/read/applications--dns-records/)
5. [FTP control/data connections and active/passive modes](https://deep-learning-study-room.vercel.app/read/cn/tee/read/applications--ftp/)
6. [SMTP phases, commands and email flow](https://deep-learning-study-room.vercel.app/read/cn/tee/read/applications--smtp/)
7. [Compare the four application protocols](https://deep-learning-study-room.vercel.app/read/cn/tee/read/applications--protocol-summary/)