Understanding ping response

The ICMP protocol’s required ECHO_REQUEST datagram is used by Packet Internet Gropher, often commonly referred to as ping, to get an ICMP ECHO_RESPONSE from a host or gateway. ECHO_REQUEST datagrams, sometimes known as “pings,” consist of an IP and ICMP header, a struct timeval, and an arbitrary amount of “pad” bytes to complete the packet.

Ping is usually used to test network device (routers & switches) and server/client machine connection. Any gadget will respond differently when a ping is sent to it. Let’s examine them in further depth.

Destination host unreachable.

The above response means the issue is with your machine’s network. Either a network card is not attached/installed OR network cable is not connected properly. Start to check from your network adapter.

Reply from 192.168.1.1: Destination net unreachable.

If you are connected to a modem OR in a network, the above response means the network device is unreachable. The network device can either be a modem, switch OR your router.

Request timed out.

The above message states that the remote machine/server is not responding. It can be down, not in the network, etc. It can also be due to ICMP requests disabled OR your IP blocked/blacklisted in the server firewall. Contact your system administrator OR web hosting provider to delist/unblock it.

Reply from xx.xx.xx.xx: bytes=32 time=574ms TTL=50

The above response means that the remote machine/server is accessible over the network. The time you receive this response, machine/server & services can be accessible.

Understanding the ping response will help you to troubleshoot the issues in a better way & in right direction.