001 and if i notice my network icon down here in the

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that we now have a DNS server configured as well and that's the correct IP address, 10.0.0.1. And if I notice my network icon down here in the Notification area, I show that it is connected and we also have Internet access. The little yellow exclamation point icon is gone that means that Windows was able to go out and contact a resource at Microsoft over the Internet verifying that the local network connectivity worksand that the Internet connectivity works as well. Now at this point there are a variety of different things we could do to test the connectivity. I could come down here and load the Edge web browser and browse to a website or we could also use the ping command. The ping command sends out anICMP echo request packet to remote hosts which then responds, hopefully, with an ICMP echo response packet and that tells us that we have connectivity between the two hosts. Let's try pinging my default gateway. 10.0.0.1 You can see from the results that communications exist between my host here and my default gateway. Now when I troubleshoot network connectivity issuesfrom the command line with ping, my methodology that I always teach to students is to first ping a host on the local network and this default gateway router interface is on my local network segment.That establishes that I have at least local connectivity. The next step is to ping another host on a different network preferably just one hop over. For example, I can ping on this network, a host that has an IP address of 67.207.38.98. This network segment exists on the other side of my default gateway. OK, notice that we got an interesting result. The first ping packet didn't get a response at all. The second one did. The next one didn't get a response. The fourth one did. That tells me that I might have some problems on the other side of my default gateway. This host, which exists on the other side on the other network on the other side of my default gateway only responded to two out of the four ping packets so at this point I would probably go over on that other network segment, most likely with the router itself, the default gateway that connects the two network segments togetherand verify why this is happening. Is it a problem with this host itself? Is it overloaded and just having a hard time responding to these ping requests? Or is the default gateway not forwarding these ICMP echo request packets or is it not forwarding the ICMP echo response packets correctly? There are lots of different things that wewould need to look at, at this point. Alright so at this point let's now ping a host that exists beyond this network out on the Internet. This will cause my ping packets to have to traverse through my network, through this other network, on to the ISP and then out on to the Internet to a remote host somewhere else in the world.
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