Connectivity Diversity Checklist

Review whether multiple network connections are independent through building, carrier and upstream paths.

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The services enter the building through separate physical points where required.Internal fibre and copper routes avoid the same rooms, risers and construction areas.The providers are not merely reselling the same underlying access circuit.Upstream carrier and exchange dependencies are understood.Network equipment does not share one power source or management path.Inbound and outbound failover behavior has been tested.DNS, firewall, NAT and session-state behavior during failover is understood.The surviving path has enough capacity for priority traffic.Monitoring identifies partial degradation as well as total link loss.Circuit identifiers, demarcations, routes and provider contacts are documented.

What genuine diversity means

Diversity is the absence of a common failure point for the scenarios that matter. It is not established by two invoices or two provider names alone.

Questions for providers

Which carrier owns the local access?
Do the paths share a duct, pole, exchange or building entrance?
Where are the handoff and demarcation points?
What route diversity is contractually committed?
How will planned maintenance be communicated?

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