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The article recommends ISC DHCP. If you want to follow the article please note, that "ISC has announced the end of life for ISC DHCP as of the end of 2022." https://www.isc.org/dhcp/

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I'm surprised they didn't recommend dnsmasq to begin with, it's a lot lighter on resources which could be important with low-end machines, and with DNS and DHCP services baked in to one process you don't need to worry about configuring hungrier services like dhcpd and BIND to read each other's state.

The only reason I'd recommend dhcpd/bind over dnsmasq for a small lab is if you are trying to familiarize yourself with the former pair for use in larger networks with more expansive requirements.

I think it has to do with this: "In fact, many of the example DHCP configuration guides from Cisco use ISC DHCP as the reference server". They just have 20+ years of training materials using ISC DHCP. And to be fair, the article is from march and ISC DHCP only got deprecated in october - while it already wasn't a good choice for beginners for many years.

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