Infographic for Day 1 of a "Zero to Hero in 26 Days" cybersecurity engineer guide, titled "What is Cyber Security? A Beginner's Guide for 2025".

Day 1 – What is Cyber Security? A Beginner’s Guide for 2025

When I first stepped into cyber security nearly two decades ago, the internet was a very different place. Back then, organizations were concerned about basic viruses and unauthorized access to their dial-up connections. Fast forward to 2025, cyber security has evolved into a massive global priority—shaping businesses, governments, financial systems, and even our daily lives. From smartphones to smart refrigerators, everything is connected. While this interconnected digital fabric is efficient, it has also created doors for cyber attackers to exploit.

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