Purpose of viruses is very often of a harmful nature - data deletion or corruption on the targeted host leading up to system in-operability in worst case scenario.
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By definition virus installation is done without user's consent and spreads in form of executable code transferred from one host to another. After successful code replication the targeted areas become "infected". Virus - a malicious program able to inject its code into other programs/applications or data files. Security 1:1 - Part 3 - Various types of network attacks.Security 1:1 - Part 2 - Trojans and other security threats.Security 1:1 - Part 1 - Viruses and Worms.The Security 1:1 series consist so far of following articles: Throughout the series I invite you as well to watch the youtube videos from Norton and Symantec channels introducing various types of threats and attacks - those are shown in really informative (sometimes as well funny) way and are very easy to understand. I will provide you as well with references to Symantec write-ups about those threat where both in-depth characteristics and removal processes can be checked. We will have a bit historical look at both known and most devastating viruses and worms in the past. We look further more on the classifications and what are the characteristics of each types.
Nowadays both terms are quite often used interchangeable but there are still differences between them. In Part 1 we start right off with Viruses and Worms - get to know the definitions and what differentiates them. Welcome to the Security 1:1 series of articles