Which of the following devices does not segment the network?
Answer: Hub
A hub does not create multiple segments on the network. A segment is a portion of the network that has a different media, collision domains, or broadcast domains. A hub simply connects devices using the same media type. All devices are members of the same collision and broadcast domains.
On a switch, each switch port is in a separate collision domain. With a router or a firewall, each connected network is a different broadcast domain.