The reason why the virtual machine cannot Ping the host: the virtual machine is not set to the NAT network mode, the virtual machine is set to the bridging mode, but the IP of the unified network segment is not configured with the host, and the host network card fails.
Solution: set the network mode of the virtual machine to NAT or bridge, but change the IP to the host IP section. If the host network card fails, restart the computer or reinstall the network card driver.
The firewall of Windows 7 does not open icmpv4 in. This rule will cause the virtual machine to Ping the host.
Solution: open the win7 firewall, select advanced settings, inbound rules, find the "file and print sharing (echo request – icmpv4 in)" rule with the configuration file type of "public" and set it to allow. The virtual machine can ping the host. You can also close the fire wall and find that the virtual machine can ping the host. (xunijipingbutongzhuji)