Google's push into broadband with its emerging fiber-optic network will be complicated by burdensome deployment costs, and a nationwide rollout would run as high as $11 billion over five years, according to an analysis by IHS iSuppli. Analyst Dexter Thillien says that despite some early gains in a handful of metro markets, it's unlikely that Google Fiber will ever have the national footprint its designers envision. "AT&T and Verizon have spent many billions of dollars establishing fiber networks in larger population centers, something Google is unlikely to be able to match," Thillien said.

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