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  1. Create IP addresses for each network in the above scenario based on the following format: (.1 for the router, .2 for example for a device). You may add one or two more devices on the LAN, with an appropriate switch, if you wish.

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  1. Given the network 89.61.128.0/24, create /30 subnet IPs for each network between the routers.

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  1. Configure static routes on the routers between all networks in the topology.

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  1. Add a default static route from R4 to the ISP

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