Company A owns a building and leases out 2 offices to other companies.
Telecom 1 provides internet to Router 1 with ip address x.x.x.121
Company A connects their router, Router A, to it and gives it IP address x.x.x.122
Company B connects their router, Router B, to it and gives it IP address x.x.x.123
Company C connects their router, Router C, to it and gives it IP address x.x.x.124
Is that effectively the same as each company having a seperate line?
Assume that A has control of the main router and each has access to their own router but no one else's.
In my case the main router is a Cisco 2811
Company A is using a Ubiquiti EdgeMax
Company B unsure
Company C a BT home hub