What is the purpose of a bridge in MikroTik, and what is a bridge port?

• A. A bridge creates a single Layer 2 domain; a bridge port connects a physical or virtual interface to that bridge.
• B. A bridge aggregates multiple IP addresses; a bridge port handles routing.
• C. A bridge acts as a firewall; a bridge port is a VLAN.
• D. A bridge translates between IPv4 and IPv6; a bridge port is a virtual interface.

Answer: (A)

A bridge in MikroTik is used to put multiple interfaces into one shared Layer 2 network, so devices connected to those interfaces can communicate as if they were on the same switch. It forwards frames within that single domain, learning which MAC addresses come from which ports and sending frames only on the appropriate port, while unknown frames get flooded to all ports in the bridge.

A bridge port is any interface that is attached to that bridge. This can be a physical Ethernet interface or a virtual interface like a VLAN interface. By adding interfaces as bridge ports, they all become part of the same Layer 2 domain and participate in frame forwarding.

Bringing in these ideas: bridges operate at the data-link layer and do not perform IP routing or address aggregation, and they are not about firewalling or translating IP versions. The essence is that a bridge creates one broadcast domain, and a bridge port is what connects each interface to that domain.