Andy has a small business selling widgets, and decided he needed an online presence to be able to expand his business. He asked his friend to help him set up a Web site on a server that he has at his business, and was quite proud of the result when the two had finished setting up the site and making it accessible to the public. Unfortunately, the next day, when he was talking to a customer about the new Web site, the customer began laughing, and asked if he had looked at it today. When Andy checked, he found the Web site had been defaced with notices about how useless widgets were and why no one should buy them. a. How could Andys site have been defaced so quickly? b. What could Andy do to help prevent this from happening again?