WEBVTT

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Everyone, welcome back to the

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course. In the last video, all we

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did is we ran a quick paying three

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scan and what we found was the

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ports that responded to us.

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Again, a lot of those were common

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ones like FTP and SMTP.

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And this video, we're just going to

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run a quick acknowledgment scan with

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ping three.

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So I'm going to start off by just

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clearing the screen in the

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background there and then we'll go

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ahead and actually type in this

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command right here.

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Also to clear the screen, as usual,

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we're just going to type and clear

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and then press enter and you'll see

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that to clear up all that stuff in

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our way.

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You don't have to do that each time.

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I just like to keep things a little

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prettier for everyone to view.

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All right, so now we're going to type

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in this command here, so HPN three,

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we're going to put a space and then

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a dash over Casey, a space,

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the number one space

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dash capital V as in Victor

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space dash lowercase P again

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to specify airport no space.

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Eighty four, the number that we want

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to scan against space that's

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lowercase s.

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And with that we're specifying part

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number five thousand five hundred

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fifty five is our port

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that the scan is coming from and

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then a space and then a dash capital

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eight to run our acknowledgment

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scan. So a lot of stuff there.

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We're just going to go step by step

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typing this in so everyone can

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follow along.

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So we're going to have been paying

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three,

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we'll put our space, we're going to

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put lower case C space

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in the number one,

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so that's lower case P,

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C excuse me, space

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cap excuse me, space number one,

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not capital one.

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Another space there.

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And then we're going to type in

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AACAP dash capital V

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and then we'll type in our Port 80

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here. So dash capital V space

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dash lower case P, space

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80. So let's go and type that in

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now. So that capital V

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space dash lowercase P

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space in the number eighty

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will put another space and

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then we're just going to type in

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dash lowercase s and

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then a space and then five five five

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five

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dash lowercase s space and then

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555.

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Almost like those Hollywood movies,

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you know where the dial like five

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five five five five five five

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whatever for the phone number.

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We're kind of doing a similar thing

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here, but not quite as in depth as a

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phone number.

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All right. Our last thing here,

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we're just going to type in the dash

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capital A and then our IP address.

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So we'll just put a space here.

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In capital A, capital

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A. And then our IP address again,

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which is 192 dot one six eight

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zero one, again, that's our servers

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or our prelapsarian server.

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Once we type that in, we're just

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going to hit enter on the keyboard.

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It might take a moment to run this

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particular scan.

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So I'm going to cause a video.

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We'll pick things back up once I've

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got the output here.

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All right, so actually, right, as I

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was watching the video, it went

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super quick this time, which is

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actually a shocker, normally takes

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about 10 or 15 seconds.

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So we already see that I have

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results on my end.

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If you for some reason don't have

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results on your end or if you get an

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error message, just double check

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your syntax.

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As we see mine took literally a

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second or so to run.

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And so it shouldn't take too long on

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your end.

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All right. So let's go to our lab

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document here. We just have one

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question here. What is the

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percentage of packet loss in

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this particular transmission?

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So we see that one packet was

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transmitted, one packet received.

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So what's our percentage of packet

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loss?

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All right, so that was an easy one,

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right, that was zero percent, and we

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could easily just tell that even if

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that wasn't showing here, we could

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tell that by one packet being

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transmitted from one package being

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received. In most cases, that should

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show us that there was a zero

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percent packet loss for that

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particular item or

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so. In this video we just talked

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about quickly, acknowledgment

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scan. We just took a look at our

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percentage of package loss on this

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one. And then we're just going to

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give it to the next video where

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we'll continue on with paing three.