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5

This has been increasingly common over the past decade as more and more network administrators decide that black-holing ICMP traffic is a good idea (whether or not it is is out of scope of this answer). Because traceroute uses ICMP traffic, when it encounters a node which does not accept or respond to them, it appears in the report that the host doing so is ...


3

Why it's working Linux, using the weak host model, makes available any IP address assigned on any interface to the host as a whole and thus visible using any other interface. So assigning an IP address on the loopback interface makes this IP address reachable, if other routing conditions allow to reach it (eg: a data center providing failover IP addresses ...


1

"Destination host unreachable" means that there was no ARP response (in case of ethernet connection) at appropriate route exit point, which in case of your private LAN should be your Linux laptop ifself (i.e. both the laptops reside in the same network 192.168.0.0/24), and if they are in distinct networks it is the router that doesn't either see ...


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