Network Services - CompTIA A+ 220-1201 - 2.3

Here's an image of a pretty common data center where you have rack after rack after rack of equipment and you can see there is a lot of equipment on one row of this and there are many rows in this particular data center. There is a lot of technology in this data center and

there are many different services running on each of these individual racks. In this video, we'll look at different services that you might expect to find in a data center like this one. We're all very used to typing in a website into our browser address bar. So, we might go to google.com or professor messor.com, but behind the

scenes, there is some work done to convert that fully qualified domain name to an IP address. The device that's doing that conversion is a DNS server. DNS, of course, stands for domain name system. and it's responsible not only for resolving an IP address from a fully qualified domain name. It can also provide that same service in reverse and

provide much more as well. This is a distributed platform with thousands and thousands of DNS servers running on the internet at any particular time. And the load across these DNS servers is distributed primarily based on the domain names that they support. So there are a group of servers that support professor messor.com. And anytime you

type in my website, it accesses either those servers or a cached version of information from those servers to be able to provide you with the appropriate IP address. This is something that's usually managed by your service provider or you may have a number of internal DNS servers that's managed by your local organization.

Another important service is DHCP or dynamic host configuration protocol. This is the protocol that's able to automatically assign IP address and other configuration settings anytime you start your computer. You don't have to remember IP addresses or type anything in. DHCP will take care of all of that work for you. This is a widely used