Greg Holden多年来一直从事有关防火墙与网络安全方面的教学工作,具有丰富的实践经验,曾编写过多本书籍,包括Guide to Network Defense and Countermeasures、Publishing on the World Wide Web、Starting an Online Business for Dummies、Tips and Tactics for Running Your Business on the Internet以及E-Commerce Essentials with Microsoft FrontPage。Greg开设了有关Microsoft Windows、Word和FrontPage方面的在线课堂,并定期为CNET、Forbes、PC Word和Computer User撰稿。
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