文件名称：Avoiding Spam
文件大小：349KB
文件格式：PPTX
更新时间：2011-10-22 08:22:32
spam
From its modest beginings as a means to share Physics data, the web has grown to be a central part of cultural, educational and, most importantly, commercial life. Millions of users today are performing financial transactions on web pages, varying from buying goods, to booking travel and hotels, to applying for credit cards or mortgages. Due to the astonishing amount of information available on the web, users typically locate useful web pages by querying a search engine. Given a query, a search engine identifies the relevant pages on the web and presents the users with the links to such pages, typically in batches of 10–20 links. Once the users see relevant links, they may click on one or more links in order to visit the pages.