Which of the following port types can be manually added to a bridge?

• A. EOIP Tunnel
• B. IPSEC
• C. PPTP Client
• D. GRE Tunnel

Answer: (A)

The capability being tested is which interface types can be added as ports to a bridge in RouterOS. A bridge operates at layer 2 and can include interfaces that carry Ethernet frames. The EOIP tunnel is specifically designed to transport Ethernet frames over an IP network, so it can be added as a bridge port to extend the same LAN across sites. This lets devices on both ends share the same broadcast domain.

In contrast, IPsec and PPTP Client function as VPN mechanisms at higher layers and do not serve as bridge ports for carrying Ethernet frames. GRE is a general IP tunnel; while useful for certain topologies, it isn’t treated as a bridge port in the same way EOIP is within RouterOS. So the EOIP tunnel is the appropriate choice for a bridge port.