Attack on Twitter

Hello,

Does anyone know the reason for the vulnerability in Twitter when a
lot of DOS attacks were made?
Were they due to the design of the application or the server where
they hosted got attacked?

Thanks,
Pratik

It was a widely publicized distributed denial of service attack. Thousands of zombie machines were used to connect to Twitter, eventually using up all available resources. No application design decision could have defended against this, only more machines.

-j

Thanks for the Information John.
How do the zombies register for twitter? Can we not prevent them using
captchas?
Can the zombies get passwords of existing users?

Can anyone attack Twitter by logging into one's own account?

-Pratik