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In this section, we are going to learn
about nat or network address translation.

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But before learn about what is nat, we
are going to create the topology first,

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so we will learn with an
example case. Let’s just start.

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Let’s import 3 router, this is router 1,
this is router 2, and this is router 3.

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Then, let’s also import 1 server,

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1 switch, and some client.

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Router 1 will be the router in the google,

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router 2 will become ISP or internet service
provider, and then router 3 is the customer.

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Let’s connecting router 1 to the server,

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let’s say this is a google, and then
from google router to ISP router,

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and from ISP to the customer.

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In the customer, we will have 2
vlan, let’s say vlan 10 and vlan 20.

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For the ip addressing, here
will be 172.16.10.1/24,

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and then the server will be 172.16.10.2/24,

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From google that connected
to ISP will be 10.10.10.1/24,

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and here in ISP will be 10.10.10.2/24,

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From ISP that connected to
customer will be 10.20.20.1/24,

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and here in the customer will be 10.20.20.2/24.

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For vlan 10, we will use 192.168.1.0/24, and
for vlan 20, we will use 192.168.20.0/24,

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Okay so this is the topology that we are going to
use to learn about network address translation.

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I think enough for this video, in the next video,
we are going to start configuring this topology.

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Thankyou for watching and
see you on the next video.