Everyone that is my I have that here in the first lecture of this course I'm going to speak about it
the Domain Name Service or what we normally you know as DNS so DNS works on port number 53 on both DC
and UDP.
And the function of the DNS is to map the domain name to IP address and vice versa.
For example if you want to go to w w w Go to Facebook Dockum.
Normally the networks are devices like Francos doesn't understand Facebook dot com so it needs to understand
what is the IP address of the server or Facebook.
In order to route the packet to that server.
And that's why the NSA to map the domain name or Facebook to come to an IP address and then the router
can route the packet to go to the server or Facebook.
So that is the main idea of the DNS.
Now on my take you can allow users to pass their DNS request through the router and the router by itself
it will forward it to the DNS server.
So I ended up coming up which is the first love I'm going to show you how you can enable that on that
either.
So how can you set the DNS on that other and allow the computers in your network to send their DNS traffic
to the router so that either will allow those traffic to come via them.
And also I'm going to show you how you can do the caching and side view of my thick router so that means
that if you have many users who are visiting Facebook.
So instead of every traffic to go to the DNS server the first user send the request to Facebook come
to gosh this inside the cockpit.
And then if the site didn't want to go to the same domain name then it will be directly mapped to the
IP address.
And also we show you how we can create static enemies inside the DNS.
So if you want for example a domain name to have a static as you always for an IP address then you can
add that on the microcosm.
That is what I'm going to show you in the upcoming lab.
It's going to be the first live and it's also a long glob.
So let's go directly and start with.