Your first ping

Two connected PCs, started, with a console open - the fastest way to prove a netplex. lab is really alive is the oldest trick in networking: ping the other side.

1

Double-click PC1 to open its console. This is a real shell inside the running container - anything you type actually executes.

2

Type ping -c 4 10.0.0.2 and press Enter. Four real replies come back from PC2, over the link you just drew - not a simulation.

That's the whole loop: draw a link, start the lab, open a console, type a command, see a real result. Everything else in netplex. - routing protocols, vendor firmware, packet captures - builds on exactly this. For a structured point-and-click version of the same check (useful once labs get bigger), see "Test reachability between nodes".