04 Try it yourself Interactive
The same five devices from section 02, the same addresses, R3 still silent. Traceroute runs four rounds, one probe each, and the TTL value sits on the packet at every device so you can watch it fall to zero at the exact hop that then reports. Ping sends one echo request through the same three routers with a normal TTL and gets one reply, which is the contrast worth having: ping crosses the path and never learns what is in it. Watch the two cards below the packet, and the Hops named counter. Nothing plays on its own: Next, Back and Reset, or the arrow keys.