They could also use PPPoE for this:<p>&gt; <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Point-to-point_protocol_over_Ethernet" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Point-to-point_protocol_over_E...</a>