On a Linux node with multiple active networks interfaces, each having a default route to the Internet, which default route is preferred?
A. The default route with the highest metric value
B. The default route with the highest MTU value
C. The default route with the lowest TTL value
D. The default route with the highest TTL value
E. The default route with the lowest metric value
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Answer E
An example for the use of metrics are routing tables, which are used for route finding during routing. The metrics are used to decide which of several possible connections should be used. Depending on the metric used, this is usually the lowest (e.g., transmission delay) or highest (e.g., bandwidth) value.
https://en.wikipedia.org/wiki/Metrics_(networking)
C