Carolyn Duffy Marsan

Green buildings have occupancy sensors so that lights and temperature automatically adjust when no one is in the room. Another common feature is raised flooring with under-floor heating and cooling

Some of the most effective ways of cutting back electricity usage -- such as raising the computer room temperature a few degrees -- also are the simplest

Most green buildings don't look like typical office buildings. They often have stark, modernistic designs and are made of Space Age materials. Time for a cultural shift

In January 2006, Michael Witt was appointed deputy director of the U.S. Computer Emergency Readiness Team within the Department of Homeland Security's National Cyber Security Division. Network World national correspondent Carolyn Duffy Marsan interviewed Witt about the Estonian cyberattack and its implications for U.S. network managers.

Increasingly popular social-networking sites such as MySpace, YouTube and Facebook are accounting for such huge volumes of DNS queries and bandwidth consumption that carriers, universities and corporations are scrambling to keep pace.

What will the IT organization of the future look like? We gathered experts for a virtual roundtable discussion about how CIOs are reorganizing their IT operations to improve customer service and gain a competitive advantage.

The LAN is the new WAN.

AT&T, Verizon Business and Qwest have hit the jackpot, winning a 10-year, US$20 billion telecommunications contract with the U.S. federal government that is the largest of its kind in the world.