The principle of preferring the route with the longest matching prefix when multiple routes apply.
The forwarding principle that, when multiple routes match a destination address, prefers the route with the longest (most specific) matching prefix. For example, if both a 192.168.0.0/16 route and a 192.168.1.0/24 route exist for a packet destined to 192.168.1.10, the more specific /24 route wins.
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