"Investigating Juniper's Junos CLI" Labs

In the Juniper labs i.e INE vMXvCP devices are connected into vMXvFP devices and we are consoling into vMXvCP devices but actually going into vMXvFP device. When logging into vMXvCP does it automatically console into vMXvFP? I don’t understand if this GNS3 specific or how does this connection works. The interface on vMXvCP side shows as em0, does that mean this initiating a console connection automatically?

Also the links show naming as eth0, eth1 etc. but the actual interface names are ge-0/0/0 etc. How does the mapping happens?