Regarding the frame relay technology, could you confirm to me that traffic using permanent virtual circuit use the same ISP routers in the path for all packets sent ? I'm a little bit confused.
Frame relay is considered as packet switching technology, but it seems to have the circuit-switching characteristics:
(Source: www.apposite-tech.com)
Could we say that the virtual packets switching technologies (like frame relay), are near the circuit switching technologies ?
Also regarding an additional point regarding frame relay. I know that the customers are identified with the DLCI identifier, locally significant, but then in the ISP infrastructure, how do the customer A traffic and customer B traffic are identified ?