The world's 10 largest sources of hacker attacks:

According to foreign media reports, the world's largest content
delivery network (CDN) provider Akamai Technologies today announced a
research report showed that the fourth quarter of 2008, the United
States first became the world's largest source of hacker attacks.
Report showed that the fourth quarter of 2008, the United States first
became the world's largest source of hacker attacks, the proportion of
22.85% for higher than the third quarter of 19.68%. China and Sweden
are two, three, the proportion was 10.67 percent and 19.30 percent,
while the proportion of the third quarter were 3.86 percent and 26.85
percent.

Figure 1: the world's 10 largest sources of hacker attacks

These attacks against the independent port 20800, which is equivalent
to the third quarter by as much as 8 times. Among them, 445 for the
port (Microsoft-DS) up to the attacks, the proportion of up to 22.96
percent, up from 21.12 percent the third quarter. Port 80 (WWW) and
139 ports (NetBIOS) are second and third, respectively, the proportion
of 11.56 percent and 14.51 percent.

Figure 2: The proportion of attacks on port plans

Downtime at the time, micro-blog Twitter downtime last year, its
competitors are at least 2 times that in 2008 the total downtime of 84
hours, ranking the first. Linkedln second, 45.8 hours for the
downtime. Myspace and Facebook and less downtime, only 4.8 hours and
7.2 hours.