A routing path is the sequence of networks, routers, and transit providers that traffic crosses to get from a sender to a destination. It can include local networks, carrier backbones, peering links, and intermediary services, even when the endpoints never directly communicate.
In cyber security, routing paths matter because they affect who can observe, delay, block, or reroute traffic. A weak or unexpected path can expose metadata, increase latency, or create opportunities for interception, traffic manipulation, and denial of service. Defenders map routing paths to verify where sensitive traffic flows, detect abnormal changes, and confirm that policy restrictions are actually enforced. In telecom risk analysis, a carrier can still matter if it remains in the path indirectly through transit or wholesale relationships, even without visible hardware on site.