Why am I unable to ping router but can ping loop-back (127.0.0.1)?

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Other answer:

Lane:
127.0.0.1 is an internal address in the actual PC, so it always responds to pings regardless if you are even connected to the router/modem.
If you cannot ping the router on your local LAN, then there is something wrong with your local network setup on the PC itself. Recheck the connections, always use a wired connection to test things before going to wireless…
?:
You are only pinging your own machine using loop-back. Pinging any other device requires a working network which your machine does not. It also requires that device to allow ping.
Richard:
What address are you using to ping the router?

If you are trying to ping your public address, then many routers do not respond to pings on that address.

2222:
First why you are pinging router. For lan connection or for internet
David E:
Loop-back is on your local computer.
Router is on your local network.

Your results mean that packets are not getting out your network interface card (NIC)
Examine the setup/drivers for your NIC.

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