Why Circuit Switching(CS >4-5% of global energy is consumed by Internet in 2010. 20 will be consumed in 2023 v CS is more green!! 1. No need for individual treatment of packets 2. Simple in transport no buffering no table look-up no header processing no counting packets 3. No dropping packets at middle of transmission congestion control at the call level 1)RS Tucker, " A Green Internet, IEEE Lasers and Electro-Optics Society, 2008➢ 4-5% of global energy is consumed by Internet in 2010, 20% will be consumed in 2023 ✓ CS is more Green!! 1. No need for individual treatment of packets. 2. Simple in transport • no buffering • no table look-up • no header processing • no counting packets 3. No dropping packets at middle of transmission. • congestion control at the call level 1) RS Tucker, “A Green Internet”, IEEE Lasers and Electro-Optics Society, 2008. Why Circuit Switching (CS) 3