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GROTON — The Internet is something many of us use but largely take for granted. We can browse the web with our mobile phone, view videos and send e-mail between computers that are thousands of miles away with many different wires, devices and other technologies in between. How is it possible that the Internet works so well with the variety of equipment, entities and differing needs simultaneously at play?

Gary Hoglund, a software and network consultant, on Thursday, Oct. 28, from 7-9 p.m., at the Groton-Dunstable Middle School North Team Meeting Room, 346 Main St., Groton, will peel back the curtain and expose how Web 2.0 applications, YouTube videos, Amazon.com purchases, Skype calls, and e-mail actually get from here to there and back.

This is a huge topic with 40 years of innovation behind it and active ongoing development expanding the depth and breadth of the network. This talk is the second of the two-part series that tries to de-mystify the technology of the worldwide Internet and give a glimpse into where things may be headed in the future.

The talk is aimed at high-school and advanced middle-school students, and is free and open to the public. Hoglund will mention career opportunities and career paths in this field, and there will be time for open discussion.

Hoglund is an independent consultant working on Internet security technology for Juniper Networks and the development of metering networks for energy-services companies. He also teaches courses on IP network protocols, design and routing. He began working on network technologies in the late 1980s at Digital Equipment Corp., including network intrusion detection systems, the commercialization of MITE Project Athena, and the creation of AltaVista Software. More recently, he has developed virtual private networking products and related technology for telecommunication carriers like AT&T, Verizon and others. He holds an M.S. in computer science and a B.S. in mechanical engineering from the University of Massachusetts.

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