Overview Tier-1 network carriers are the literal backbone of the internet. They can reach the entire global routing table through the sum of their downstream customers and settlement-free peering partners and are, by definition, completely transit- free. Network capacity and reliability are market differentiators for them, and they generate revenue from tier-2 and tier-3 carriers by charging for data transit. T o win in this intensely competitive market, tier-1 carriers must provide outstanding network performance and security, identify the highest potential new prospects, and service customers profitably. Interestingly, the network itself – specifically, the network traffic data – provides invaluable intelligence for both technical and business operations for tier-1 carriers. That

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