Buffer Overflow
A buffer is a software programe that stores computer data before sending it on in smaller easier to manage packets. A buffer overflow happens when more data is put into a buffer or a holding area than the buffer can handle. This is due to a problem with the processing rates between the buffer and the device sending the data. When an overflow occurs it can result in a system crash or a back door being created.
It is some times used by black hat hackers in order to cripple a computer
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