Choosing the right ISP tier is no longer just a network decision—it’s a business-critical strategy for CIOs. Tier 1 ISPs deliver global backbone connectivity and ultra-low latency, essential for AI workloads and multi-cloud performance. Tier 2 providers balance cost and reach through hybrid peering, while Tier 3 ISPs enable localized last-mile access. Understanding these tiers empowers CIOs to design resilient WANs, negotiate smarter contracts, and ensure enterprise networks are ready for the AI-driven future.