LEON HARRIS, CNN ANCHOR: Yahoo! is up and running again after computer hackers closed down the Web site for several hours yesterday. Experts say the attack on the popular on-line search engine shows just how vulnerable the Internet can be. Reporter Anthony Moore (ph) explains.</s>ANTHONY MOORE, KRON REPORTER (voice-over): If every Chevron pump suddenly went dry, or every Macy's store suddenly couldn't open its doors, that's what happened to Yahoo! Monday. The world's most popular Web site, valued by Wall Street at $93 billion was all but shut down. The cause: pranksters jamming it.</s>JEFF MALLETT, YAHOO! PRESIDENT: Never have we seen anything to this scale before. It came from multiple points across the Web, so it wasn't just one -- someone sitting at their PC. It appeared to be a planned attack, and it literally sent -- just to give you a sense of this, one gigabyte of data was requested per second, and some sites get that in an entire year.</s>MOORE: Security consultant Peter Shipley is plugged into the hacker community. He offers several reasons why hackers might have done this.</s>PETER SHIPLEY, SECURITY CONSULTANT: Because it can be done, proof of -- you know, to prove that, no matter how big you are, you still can be taken down. Maybe it's somebody trying to make a name for themselves. We don't know yet.</s>MOORE: Yahoo! indexes the Web. It delivers an average 465 million page views per day.</s>HARRIS: And that was reporter Anthony Moore of our affiliate KRON, San Francisco.
Yahoo! On-Line Again After Hackers Close Down Web Site for Several Hours