Which Layer 2 device connects two or more networks but forwards data to the next network without analysis?

Which Layer 2 device connects two or more networks but forwards data to the next network without analysis?

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

Answer: (A)

A bridge is the device that connects two or more network segments at Layer 2 and forwards frames between them without performing higher-layer analysis. It learns MAC addresses on each segment and uses that information to decide where to send a frame: if the destination MAC is on the other segment, it forwards; if not, it can filter or flood only as needed. It doesn’t inspect IP addresses or make routing decisions, so there’s no Layer 3 analysis involved. This makes it the best fit for the description: it links separate networks and passes frames across them while avoiding deeper analysis. A hub simply repeats signals to all ports and doesn’t segment networks. A router moves traffic between networks using IP and routing decisions. A switch also forwards based on MAC addresses, but is typically used to extend a single LAN rather than connect distinct network segments.

A bridge is the device that connects two or more network segments at Layer 2 and forwards frames between them without performing higher-layer analysis. It learns MAC addresses on each segment and uses that information to decide where to send a frame: if the destination MAC is on the other segment, it forwards; if not, it can filter or flood only as needed. It doesn’t inspect IP addresses or make routing decisions, so there’s no Layer 3 analysis involved.

This makes it the best fit for the description: it links separate networks and passes frames across them while avoiding deeper analysis. A hub simply repeats signals to all ports and doesn’t segment networks. A router moves traffic between networks using IP and routing decisions. A switch also forwards based on MAC addresses, but is typically used to extend a single LAN rather than connect distinct network segments.