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Subnet planning alongside IPv4 and IPv6 diagnostics

Explicit DNS queries over plain and encrypted transports

Identify resolver behavior, DNSSEC and subnet disclosure

A portable malware-removal utility for an existing infection

Free college-level study designed around CLEP preparation, with an acceptance-checking tool.

Run mass pings and inspect hosts through a graphical toolbox

A consolidated suite for network measurements and discovery

Inspect Unix-like systems for hardening opportunities

Inspect a website's current check and response-time history

A Windows diagnostic toolbox for common administration checks

DNS and mail configuration reports with protocol references

Revise a resume or CV with checks and matching cover letters