Comcast Corp., the nation's leading provider of residential high-speed Internet access, has received official word that it is being investigated by the Federal Communications Commission in connection with its network management practices, two sources said Monday.

The FCC's Enforcement Bureau, according to sources, sent Comcast a letter on Jan. 11 that spelled out in general terms the agency's interest in knowing whether Comcast is managing its network in a manner consistent with the agency's August 2005 "policy statement" with four consumer-centric "principles" to ensure that "that broadband networks are widely deployed, open, affordable, and accessible to all consumers."

FCC chairman Kevin Martin signaled the launch of the investigation in comments Jan. 8 at the Consumer Electronics Show in Las Vegas.

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