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Networking

Internet Leased Line

(ILL)

A dedicated, symmetrical, uncontended internet connection between a customer and an ISP.

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Definition

An Internet Leased Line (ILL) is a dedicated, symmetrical, uncontended internet connection provided by an ISP directly to a customer site. Unlike broadband, ILL bandwidth is guaranteed (not shared with other customers), upload and download speeds are equal, and the connection comes with a contractual SLA from the ISP. ILLs are the standard for enterprise connectivity where uptime, latency, and predictable performance matter more than cost optimization.

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