David Ginsburg is currently vice president of Marketing and Product Management for Allegro Networks, a Silicon Valley startup that is building the first multi-router system. Prior to joining Allegro, he was a vice president of Marketing at Nortel Networks. He went to Nortel via its acquisition of Shasta Networks, where he was a founding member of Shasta's marketing team that defined the industry's first broadband-services strategy. Before joining Shasta, Dave was with Cisco Systems as product manager for their DSL aggregator platform. Earlier roles at Cisco included WAN and LAN consulting engineering for key customers, at which time he was responsible for LAN switching, as well as ATM standardization and deployment. Dave is the author of two other books in the field of networking, both of which are available from Addison-Wesley.