You are setting up the local network for your office. You need that network to be able to connect to a different network on a different floor of the same building. Of the given options, which one is most likely needed for connectivity?
A router is a layer 3 networking device that works using IP addresses to connect 2 or more IP networks. A layer 3 device such as a router is required to connect different IP networks. Because the question states it is a different network, a router would be needed.
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