The CNT Books network is expanding. There are 200 more user stations in the building, and a total of five floors are in use by the network.

You have kept up with the design so far with a network of five subnets, each with its own router.

The company leased a building across the street. You expect at least four subnets to be added to the design.

The owner is concerned about how to connect to the building across the street as he thinks the cost of contracting with a communications provider is too expensive for such a short distance.

What solution can you suggest for connecting the building across the street with the existing building?