When a Cisco router receives route information for the same destination network from multiple routing sources, which criterion does it use first to decide which route to install in its routing table?
Administrative distance
Hop count
Cost
Bandwidth
A Cisco router uses Administrative Distance (AD) to determine the trustworthiness of routing information received from different sources. The route with the lowest AD is preferred and installed in the routing table. While hop count, bandwidth, and cost are metrics used by individual routing protocols—such as Routing Information Protocol (RIP), Open Shortest Path First (OSPF), and Enhanced Interior Gateway Routing Protocol (EIGRP)—to select the best path within their own protocol, these metrics are considered only after administrative distance when the router chooses between different routing sources.
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