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Free Bangla Book: Prathomik Biggyan (Class-4 By


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Prathomik Biggyan (Class-4

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National Curriculum and Textbook Board (NCTB) has published new year’s Textbooks for class 1 to class 10. These classes comprises primary education and secondary education in Bangladesh as well as rest of the world.

These books are provided for free to all school going children of Bangladesh. Here are the PDF versions of the Textbooks for download. I hope, these books will be also helpful for others also as all had to read these in their childhood. So, download them and read to bring back your childhood life.


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Vulnerabilities & Concepts

Vulnerability Types

Cross Site Scripting (XSS)

This vulnerability allows data to be injected into webpages. This data is then interpreted as code and executed by the viewer‘s web browser, which can effectively be seen as remote controlling a victim‘s browser.

Cross Site Request Forgery (CSRF)

CSRF refers to a type of exploits where the victim‘s browser is being tricked into triggering an authenticated action inside a vul...

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