Sub domain difference

what is the difference between these three tls Cloudflare subdomain which one should i use

1dot1dot1dot1 Cloudflare-dns com
one.one.one.one
security Cloudflare-dns com

All the three lead you to the desired function. however, you may choose either to use as DNS resolver or for family & more . Featured information here:

it’s mean both 1dot1dot1dot1.Cloudflare-dns com and one.one.one.one are same and third one is for family right

1.1.1.1 for-families has two flavors:
1.1.1.2 (No Malware) & 1.1.1.3 (No Malware or Adult Content)

Information is posted in the attached articles on use cases.

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