Emerging high-speed access technologies

Networks are fast becoming the backbone of many businesses, but the technology behind them is probably the most complex and least understood IT subject. It's not enough to have a particular network in place-you must also keep data flowing from site to site and to and from the Internet at adequate speed. This is where the choice of access technologies-the various ways your enterprise can connect to larger networks-is crucial. Your choices have never been more diverse. After years of talk about how to upgrade the "last mile" (the connection from your location to a hub or central office), vendors now have products to offer. Some are relatively immature, having only recently become commercially available. Regardless, they can make an immediate difference in throughput. To benefit, you'll need to navigate some complex vendor options and keep an eye on future developments in technology and standards. To help guide your decision making, the authors present a brief overview of new network access technologies. Be aware that deployment depends on location and market: some of these technologies may be available in your area, others may not. The following are mentioned: phone line access; digital subscriber lines; cable modems; and direct broadcast satellites.