When a router receives routes to the same destination from different routing protocols, what does it use to determine the preferred route to install in its routing table?
Routers use administrative distance to determine the preferred route when multiple routing protocols provide routes to the same destination. Administrative distance is a numerical value that rates the trustworthiness of the routing information received from each routing protocol; the lower the value, the more preferred the route. While metric values are used to compare routes within the same routing protocol, they are not used to compare routes from different protocols. Bandwidth and hop count are specific metrics used by certain routing protocols but do not influence route selection between different protocols.
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Cisco CCNA 200-301
IP Connectivity
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