1x Micro-USB Power Cable or Supply – This will be used to power the Raspberry Pi. 1x microSD Card (4 GB or larger) – This provides the storage to install the Raspbian Linux operating system on the Raspberry Pi. 1x Raspberry Pi – A Raspberry PI 2, 3, or 4 will work, as will a Raspberry Pi Zero*. Since we are looking at setting up a Raspberry Pi to run Pi-hole, you will need the following items: You will need a computer that runs linux to install it, and that can be a Raspberry Pi (as this article discusses) or Pi-hole can even be run in a Container to integrate it within any network. Pi-hole is server software that runs on LInux. Now, let’s dig into setting up Pi-hole on a Raspberry Pi! By setting up Pi-hole as the DNS server on your network, it intercepts all DNS name resolution requests, and enables you to block those that you don’t want such as ads, trackers, or even any NSFW websites. This DNS Lookup is performed not just within the web browser, but by any software that is requesting to communicate with a server on the Internet such as any apps on your smartphone, computer, tablet, or other devices. DNS is what your compute uses to turn a domain name (such as ) that is typed into a web browser, into the IP Address (such as 8.8.8.8) that the computer connects to in order to download and display the requested web page. 
Pi-hole works on the DNS (Domain Name Service) level. As such, you can also install Pi-hole on a small business network to block undesired websites, and this is a really great cheap option for businesses. Pi-hole can be used on any network, so long as the hardware it’s installed on has the resources to handle all the DNS queries of that network. Most often Pi-hole is talked about as being used for blocking website advertisements on a home network. You simply setup the Pi-hole, configure your network, and everything just works for all devices connected to the network. As a DNS server, it is setup to block unwanted / undesired traffic on your entire network without needing to install anything on your smartphone, laptop, or other devices. Pi-hole is free and open source software for setting up a DNS (Domain Name Service) and DHCP (Dynamic Host Configuration Protocol) server with built-in functionality to be able to block ads, trackers, and other websites.
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