# Technology Explained: Hosting, AI and Software \| RDPCORE Blog

> Explore how websites and applications work, from DNS and VPS hosting to secure accounts and AI evaluation\. Browse the RDPCORE Blog by topic\.

## Categories

- [AI](https://rdpcore.blog/en/category/ai): How to evaluate AI models, check their answers and decide what to automate\.
- [Software](https://rdpcore.blog/en/category/software): Code, testing and the tools that help developers maintain what they build\.
- [Cybersecurity](https://rdpcore.blog/en/category/cybersecurity): Account protection, software updates and recovery when something goes wrong\.
- [Tech News](https://rdpcore.blog/en/category/tech-news): What changed in technology, who it affects and which details deserve a closer look\.
- [Networking](https://rdpcore.blog/en/category/networking): Trace the path from a DNS lookup to a response, and learn what can slow it down\.
- [Hosting \& Servers](https://rdpcore.blog/en/category/hosting-servers): VPS sizing, server monitoring and backups for the services you run\.

## Latest stories

- [DNS over HTTPS (DoH) vs\. DNS over TLS (DoT): Mechanisms and Trade\-offs](https://rdpcore.blog/en/articles/dns-over-https-vs-dns-over-tls.md): Both DoH and DoT encrypt DNS queries to protect user privacy, but they operate at different layers of the network stack\. Understand the practical impact of port 443 versus port 853 on visibility and firewalling\.
- [Trace a Slow Network Request One Phase at a Time](https://rdpcore.blog/en/articles/trace-a-slow-network-request.md): Separate cumulative DNS, TCP, TLS and response timings, then compare them with application traces from the same request\.
- [VM Snapshots and Backups Solve Different Problems](https://rdpcore.blog/en/articles/vm-snapshots-and-backups.md): An upgrade failure and a lost storage volume require different recovery plans\. Test the failure you actually intend to survive\.
- [How to Verify an Access Control Fix in Staging](https://rdpcore.blog/en/articles/test-an-access-control-fix.md): A denied proof of concept can be a false success\. Add a permitted control and inspect stored state and asynchronous side effects\.
- [Write Tests Around Boundaries, Not Implementation Details](https://rdpcore.blog/en/articles/test-behavior-at-boundaries.md): Use the cent below, at and above a shipping threshold to specify behavior without coupling tests to helper calls\.
- [Test Retrieval Before You Rewrite the Prompt](https://rdpcore.blog/en/articles/test-retrieval-before-changing-prompts.md): Give the generator the correct passage in a controlled test\. The result helps distinguish a retrieval failure from a grounding failure\.
- [Read a PostgreSQL Query Plan Before Adding an Index](https://rdpcore.blog/en/articles/read-postgres-query-plan.md): Read the first bad estimate and repeated inner work before adding an index\. A cheap node can be expensive when it runs thousands of times\.
- [A Security Review for a Small Web Service](https://rdpcore.blog/en/articles/security-review-small-web-service.md): Start with one asset and one transaction\. An invoice download reveals more about access control than a list of installed security tools\.
- [How to Read an Ablation Study](https://rdpcore.blog/en/articles/read-an-ablation-study.md): A half\-point gain becomes meaningful only in context\. Examine comparable baselines, variation and interactions before adopting a component\.
- [What a New Chip Benchmark Actually Tells You](https://rdpcore.blog/en/articles/read-chip-benchmark-claims.md): Speed, throughput, elapsed time and energy are different measures\. Read the system disclosure before translating a chart into a purchase\.
- [How to Read a Technology Announcement Without the Hype](https://rdpcore.blog/en/articles/read-a-technology-announcement.md): Separate an announced plan from available infrastructure, then identify the evidence a reader needs for a deployment decision\.
- [Draft, Standard or Rule? How to Read a Tech Policy Headline](https://rdpcore.blog/en/articles/read-a-standards-announcement.md): Use TLS 1\.3 to distinguish a standards document from a deployment deadline or binding policy\.

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