In
January of 06 the Slammer worm (a worm is a
malicious program that replicates without human
intervention) exploited a weakness in Microsoft
Web server software, spreading so quickly that
it overloaded tens of thousands of business
and government computer servers on the Internet.
It was the largest such incident since the Code
Red and Nimda worms struck the Internet
A virus will usually execute when it is loaded
into a computer's memory. On execution, it instructs
its host program to copy the viral code into
any number of other programs and files stored
in the computer. The corrupted programs may
continue to perform their intended functions
while also executing the virus's instructions,
thus further propagating it. The infection may
transfer itself to other computers through storage
devices, computer networks, and on-line systems.
A harmless virus may simply cause a cryptic
message to appear when the computer is turned
on; a more damaging virus can destroy valuable
data. |
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