The router will use Route 2 (192.168.1.128/25 via 10.0.0.2) because it has the most specific subnet mask, representing the longest prefix match. The subnet mask /25 matches more bits (25 bits) of the destination IP address than /24 (24 bits) or /16 (16 bits). By matching the greatest number of leading bits, the router ensures the packet is forwarded along the most precise path to its destination.
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Cisco CCNA 200-301
IP Connectivity
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