In a typical home MikroTik router, which interface is commonly connected to the ISP?

• A. Bridge interface
• B. WAN interface (ether1/eth1)
• C. LAN interface
• D. WLAN interface

Answer: (B)

The path to the internet from a home MikroTik router is through the WAN interface. This uplink port is where your ISP’s modem or gateway connects, and it’s the interface the router uses to obtain an external IP address (via DHCP, PPPoE, or static settings) and route traffic to and from the rest of your network. In most MikroTik home devices, this is the first Ethernet port (often labeled ether1/eth1), designated specifically for the internet connection.

The other interfaces serve different purposes. The LAN interface(s) provide access to your local devices—computers, printers, and wired switches—within your home network. The WLAN interface handles wireless clients. The bridge interface is used to join multiple interfaces at layer 2 into a single network segment or to connect different network pieces together in special configurations; it’s not the usual path to the ISP. So, for connecting to the ISP, the WAN port is the correct and typical choice.