Which of the following describes bridging PPP-based tunnels on a single router?

• A. All PPP-based tunnels can be bridged
• B. No PPP-based tunnels can be bridged
• C. Bridging is limited to two tunnels
• D. Bridging requires a licensed feature

Answer: (A)

Bridging PPP-based tunnels on a MikroTik router works because a PPP tunnel is just another interface that can be part of a bridge, just like an Ethernet interface. When you add those tunnel interfaces to a bridge, the router forwards frames between all bridge ports at Layer 2, so the networks on the other ends of the PPP tunnels become part of the same broadcast domain through that single device. There isn’t a built-in limit that stops you from putting multiple PPP-based tunnels into one bridge on one router; you can add as many as the device’s resources allow. Licensing isn’t a factor for this capability either—bridging PPP tunnels is a standard feature. So the statement that all PPP-based tunnels can be bridged on a single router is the correct understanding.