Which of the following is a network device that connects two or more network segments?

A Router is a crucial network device designed to connect two or more distinct network segments or subnets, forwarding data packets between them. Routers operate at the network layer (Layer 3) of the OSI model and are responsible for directing data traffic by making intelligent decisions about the best path for packets to travel based on IP addresses. For example, a router connects your home local area network (LAN) to the broader internet (a wide area network, WAN), enabling communication between devices in different networks. They are essential for inter-network communication and the functioning of the internet.

• B: Switch: A switch connects multiple devices within a single local area network (LAN) segment. It operates at the data link layer (Layer 2) and forwards data frames to specific destination devices based on their MAC addresses, but it does not connect different IP networks together.
• C: Primary Network: This term is a descriptive phrase that might refer to a main or central network, but it does not designate a specific type of network hardware device with the function of connecting segments.
• D: Topology: Network topology refers to the arrangement or structure of a network's connections, nodes, and devices. It describes the physical or logical layout (e.g., star, bus, mesh) of a network, rather than being a network device itself.