By default, which criterion does a router use first when selecting a route to forward a packet?
It forwards packets based on the oldest route in the table.
It prefers the route with the lowest metric.
It chooses the route with the lowest administrative distance.
It selects the route with the longest matching prefix.
Routers use the longest prefix match when selecting a route to forward a packet. This means the router looks for the most specific route that matches the destination IP address. If multiple routes are available, the one with the longest network prefix (most matching bits) is chosen. Administrative distance and routing protocol metrics are considered only if multiple routes have the same prefix length.
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