ping 0 <===> pinkne localhost
ping -a server01 <===> use an audible cue with ping, letting me know when the pings are successful
ping -c 5 192.168.2.200 <===> pošle přesne 5 paketu
gping 192.168.2.200 <===> ping v graficke podobe
Destination Host Unreachable
The possible best reason is there is no route from the local host system and to the destination desired destination host, or a remote router reports that it has no route to the destination host.
Request timed out
This result means that no Echo Reply messages were received within the default time of one second or the time that you set while you are pinging that host.
This can be due to many different causes; the most common include network congestion, failure of the ARP request, packet filtering/firewall, etc.
Unknown host - Ping Request Could Not Find Host
Maybe you misspelled the hostname or the host does not exist at all in the network.
You must have 0% packet loss for every ping result with a good latency or lower response time.
Depending on which transmission medium (UTP, fiber optics cable, Wi-Fi) you're using, your latency will differ.
