問題文
A device has a default route 0.0.0.0/0 pointing at an upstream provider and also has a more specific route for 203.0.113.0/24. Traffic for 203.0.113.9 is observed leaving through the more specific path. Why?
選択肢
- The default route matches every destination with zero bits, so any longer match wins over it.
- The more specific route has a lower metric.
- The upstream provider withdrew the default route for that destination, which is why the traffic had to be moved onto a different path by the device without any configuration change.
- The default route is used only when the device has no other routes at all, so any device that also holds a specific entry leaves it unused.