Publishing Rationale - Internet Protocol (IP) - is the main communications protocol used in the Internet and on the vast majority of corporate networks. - Growing needs for networks - Networks are becoming bigger and more complex. Currently, corporate networks are not designed to accommodate multimedia; therefore, IP based networks need to be redesigned to meet the demands. Demands will include Voice over IP, ATM over IP, and more. IP Network Design will guide network professionals through the processes on how to meet these demands. - Soaring unified messaging product sales - Voice over IP products sales are skyrocketing, from ?139 million in 1999 to ?2.4 billion in 2006 (Frost and Sullivan). Therefore, there is an enormous market to have a guide for network professionals to understand how to implement and design this high selling innovative products. According to a current study (UC Davis, 1999), by the end of 2001 in excess of 95% of corporate data applications in the US will exclusively use IP.