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This is one of multiple videos discussing IP submitting.
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I've received numerous questions with regards to my P submitting and I'm going to try and answer a lot
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of them through these videos.
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So here's a question for you.
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Well p.s. one on the left.
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Be able to ping P.S. 200 right in this typology P.S. on the left is configured with an IP address of
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10 to 1 to 2 4 5 dot 1 slash is 17.
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And the PC on the right is configured with an IP address of 10 to one.
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Dr. 1:28 talk to slash 17 in the apology I'm using Cisco routers instead of Windows PCs.
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As it's important for you to learn the Cisco CLID it's important for you to learn commands available
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on Cisco devices.
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So show IP interface brief shows me the IP address configured on the gigabit 00 interface of the router
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show IP interface brief shows me the IP address configured on gigabit 00 of this router show run interface
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gigabit 00 shows me the configuration of the IP address and we can see that over here as well and show
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IP interface gigabit 00 shows us the configuration of router 2 and same on the side show IP interface
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gigabit 00 that's the IP address of router one acting as one he has the IP address of rodder to acting
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as PC too.
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So will these two routers acting as PCs be able to ping each other so paying $10 to wonder too far 5.1
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right.
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To is able to ping rodded one we can actually see that in real time by using a de-bug IP ICMP command
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that de-bug allows us to see my sim traffic in real time.
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I see the protocol used by ping in this example I'll send a single ping to rot of one ping succeeds
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and we can see that echo reply was sent back to Rodda to with a source IP address of 10 1 2 4 5 1 destination
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IP address of 10 to 1 1 2 8 2 2.
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So how do we know that they were in the same subnet.
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Show run interface gigabit 00 show run interface gigabit to 0 0.
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You need to look at a network and host portions to.
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Five means that the first octet is a network.
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Two four five means that the second octet is a network here.
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However we've got 128 in the network portion.
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So it becomes a little bit more tricky to work out host and network portions.
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So let's try that out.
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Together 10 that one is fairly simple.
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That's the network portion.
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However 128 in binary equals 1 followed by seven binary zeros.
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Just put a space here to make it easier to read.
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Obviously that space doesn't exist.
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But I'll just do that for clarity of reading.
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So this is the IP address portion.
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And this is the mosque a binary one in the mosque indicates that that portion is part of the network
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zeroes in the mosque indicates that this is host portion.
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So in this example the network portion of the address equals ten not one in decimal.
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And then the first binary but in the third octet if we look at the address here tendered one network
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portion based on that that's the same as what we've got over here.
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But in the third octet we've got 255 255 in binary is eight binary ones.
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And again I'll put a space check just for clarity.
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The mosque he calls 1:28.
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So in this example the network portion is the first but which is the same as 128.
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So if you look at the address here 10 dot one dot first binary boaties network and the same is true
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here.
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10.0 one plus first binary but no third octet is network.
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The rest of the address is the host portion.
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So I'll write it up fully 10 dot one dot 255 and one in binary equates to 0 0 0 0 1 0 1 0.
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That's 10 dot seven binary zeros and one binary one that's 1 dot 8 PENDREY ones.
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Followed by seven hundred zeros and a binary one.
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So that is the address in binary half tender 1 2 4 5 to 1.
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And if we look at the mosque we've got 8 binary ones in the first octet.
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So the first octet is network second octet is also network.
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But in the third octet we have one binary one followed by seven binary zeros.
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So this portion is the network portion.
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This portion is the host portion
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so blue is host
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red is network portion.
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If we look at the other address used in the network which is tendered 1 128 to
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the host portion is different but the network portion is the same.
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So these two devices even though they have different hoost portions are still in the same subnet.
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Based on that information there.
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So they are in the same subnet
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and hence the device on the right.
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Can paying the device on the left Ping's succeed and we can see the debug output on the screen.
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So I hope you found this video useful if he did please like it and please subscribe to my YouTube channel.
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I wish you all the very best.
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