Question

_ sends and recieves data only in plain text , without any kind of encyption ​

Answer 1

Explanation:

encrypted, right?

It is, but not at the place you're reading it. Encryption happens at a certain point in the "pipeline", and decryption then must also happen at a certain point in the "pipeline" (otherwise the data are useless). You are observing the data after they have been decrypted, which would not be possible if you were using HTTPS (which instead provides end-to-end encryption, which starts at the server and ends at the browser).

If you attempted to use Wireshark to capture the contents of an HTTPS transaction, it'd be like this: