An enterprise customer is weighing options for a backup Internet connection to support their online retail system, which must maintain high uptime. Their current primary connection is a fiber link with a Service-Level Agreement (SLA) for 99.9% uptime. Which alternative Internet connection type would generally serve as the best secondary option for uptime reliability without consideration for costs?
A leased line provides a dedicated connection with higher reliability and an SLA similar to fiber. It's often used as a backup for critically important services such as high-availability online retail systems, providing a suitable level of redundancy. While a DSL connection is widely used, its uptime and speed may be insufficient for a commercial operation as a backup for a fiber connection in case of an outage. Satellite can experience latency and disruptions due to weather, which is not ideal for backup purposes with high uptime demands. Similarly, a cable connection, though typically reliable, shares bandwidth with other users and doesn't always offer the level of SLA that a leased line would.
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