Which device connects network segments within a LAN to forward data between segments?

Which device connects network segments within a LAN to forward data between segments?

• A. Hub
• B. Switch
• C. Modem
• D. Router

Answer: (B)

Switches connect multiple network segments inside a LAN and forward data toward the correct destination segment. They learn which devices are on which ports using MAC addresses and, when a frame arrives, send it only to the port that leads to the destination device. This keeps traffic localized, improves performance, and reduces collisions. A hub would broadcast every frame to all ports, causing unnecessary traffic and collisions. A modem links the LAN to an external network like an ISP, not to interconnect segments within the LAN. A router connects different networks and routes traffic between them, which is about inter-network paths rather than moving data between segments inside a single LAN.

Switches connect multiple network segments inside a LAN and forward data toward the correct destination segment. They learn which devices are on which ports using MAC addresses and, when a frame arrives, send it only to the port that leads to the destination device. This keeps traffic localized, improves performance, and reduces collisions. A hub would broadcast every frame to all ports, causing unnecessary traffic and collisions. A modem links the LAN to an external network like an ISP, not to interconnect segments within the LAN. A router connects different networks and routes traffic between them, which is about inter-network paths rather than moving data between segments inside a single LAN.