Most Web sites are operational and the Internet remains available to support critical communication functions. About 100 of Japan’s 6,000 network prefixes — or segments — were withdrawn from service. Traffic to and from Japan dropped by about 25 gigabits per second right after the Friday quake. Traffic at Japan’s JPNAP Layer 2 Internet exchange service appears to have slowed by just 10% since Friday. Undersea cables remained relatively untouched by the quake, unlike in 2006 when an earthquake in Taiwan resulted in major cable breaks.”]