What is the effect of creating a bridge between two interfaces in MikroTik RouterOS?

• A. It forwards frames at Layer 2 and keeps devices in the same broadcast domain.
• B. It routes IP packets between subnets.
• C. It assigns IP addresses to interfaces automatically.
• D. It blocks all broadcast traffic.

Answer: (A)

Bridging in RouterOS works like a small layer-2 switch: it connects multiple Ethernet-like interfaces into one bridge, learns where devices live by their MAC addresses, and forwards frames between the bridged ports. Because this operates at Layer 2, it doesn’t inspect or route IP packets between different subnets; routing would require a separate router acting on Layer 3. All devices on the bridged interfaces effectively share the same broadcast domain, so frames such as broadcasts, ARP, and multicast are flooded to all ports in the bridge. It doesn’t automatically block broadcast traffic—that would require explicit filtering or firewall rules—though loops from bridging can be mitigated with mechanisms like spanning tree.