Jane McCallion of PC Pro writes: "Hacking and hackers are the stuff of mythology, film, and often breathless headlines. From the attacks that brought down Mastercard and Visa's websites in 2010 to the Xbox Live and PlayStation outages of Christmas 2014, it sometimes feels like our systems are under permanent assault from those who would take them offline.
"And yet, none of these are true hacks - most simply involve overloading websites with requests until they cease to function."
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A cyberattack kept the whole country's government offline for a month.
