Everyone, welcome back to the
course. In the last video, all we
did is we ran a quick paying three
scan and what we found was the
ports that responded to us.
Again, a lot of those were common
ones like FTP and SMTP.
And this video, we're just going to
run a quick acknowledgment scan with
ping three.
So I'm going to start off by just
clearing the screen in the
background there and then we'll go
ahead and actually type in this
command right here.
Also to clear the screen, as usual,
we're just going to type and clear
and then press enter and you'll see
that to clear up all that stuff in
our way.
You don't have to do that each time.
I just like to keep things a little
prettier for everyone to view.
All right, so now we're going to type
in this command here, so HPN three,
we're going to put a space and then
a dash over Casey, a space,
the number one space
dash capital V as in Victor
space dash lowercase P again
to specify airport no space.
Eighty four, the number that we want
to scan against space that's
lowercase s.
And with that we're specifying part
number five thousand five hundred
fifty five is our port
that the scan is coming from and
then a space and then a dash capital
eight to run our acknowledgment
scan. So a lot of stuff there.
We're just going to go step by step
typing this in so everyone can
follow along.
So we're going to have been paying
three,
we'll put our space, we're going to
put lower case C space
in the number one,
so that's lower case P,
C excuse me, space
cap excuse me, space number one,
not capital one.
Another space there.
And then we're going to type in
AACAP dash capital V
and then we'll type in our Port 80
here. So dash capital V space
dash lower case P, space
80. So let's go and type that in
now. So that capital V
space dash lowercase P
space in the number eighty
will put another space and
then we're just going to type in
dash lowercase s and
then a space and then five five five
five
dash lowercase s space and then
555.
Almost like those Hollywood movies,
you know where the dial like five
five five five five five five
whatever for the phone number.
We're kind of doing a similar thing
here, but not quite as in depth as a
phone number.
All right. Our last thing here,
we're just going to type in the dash
capital A and then our IP address.
So we'll just put a space here.
In capital A, capital
A. And then our IP address again,
which is 192 dot one six eight
zero one, again, that's our servers
or our prelapsarian server.
Once we type that in, we're just
going to hit enter on the keyboard.
It might take a moment to run this
particular scan.
So I'm going to cause a video.
We'll pick things back up once I've
got the output here.
All right, so actually, right, as I
was watching the video, it went
super quick this time, which is
actually a shocker, normally takes
about 10 or 15 seconds.
So we already see that I have
results on my end.
If you for some reason don't have
results on your end or if you get an
error message, just double check
your syntax.
As we see mine took literally a
second or so to run.
And so it shouldn't take too long on
your end.
All right. So let's go to our lab
document here. We just have one
question here. What is the
percentage of packet loss in
this particular transmission?
So we see that one packet was
transmitted, one packet received.
So what's our percentage of packet
loss?
All right, so that was an easy one,
right, that was zero percent, and we
could easily just tell that even if
that wasn't showing here, we could
tell that by one packet being
transmitted from one package being
received. In most cases, that should
show us that there was a zero
percent packet loss for that
particular item or
so. In this video we just talked
about quickly, acknowledgment
scan. We just took a look at our
percentage of package loss on this
one. And then we're just going to
give it to the next video where
we'll continue on with paing three.