What Is an API Key?
An API key is a secret string that identifies an application calling an API. Learn how keys are sent, scoped, rotated and kept out of public code.
Knowledgebase
Clear answers to common hosting questions, written by our editors.
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By Maarten Soetens
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What Is gRPC?
gRPC is an open-source framework for remote procedure calls between services. Learn how Protocol Buffers, HTTP/2 and streaming work together.
By Maarten Soetens
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HTTP Methods Explained
HTTP methods tell an API what to do: GET reads, POST creates, PUT and PATCH update, DELETE removes. Learn which methods are safe and how they map to CRUD.
By Maarten Soetens
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Critical CSS
Critical CSS is the styling a page needs to draw its first screen, placed directly in the HTML. Learn how it works, what it costs and when it helps.
By Maarten Soetens
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HTML vs XML Sitemap
HTML sitemap vs XML sitemap explained: learn how a page for visitors differs from a file for search engines, and when each one is useful for a site.
By Maarten Soetens
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Clickjacking
Clickjacking tricks visitors into clicking hidden buttons inside a disguised frame. Learn how the attack works and how frame-blocking headers prevent it.
By Maarten Soetens
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IP Transit vs Peering
IP transit vs peering explained: paid transit reaches the whole internet, while peering swaps traffic directly between networks. Compare costs and routes.
By Maarten Soetens
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What Is KVM Virtualization?
KVM virtualization turns the Linux kernel into a hypervisor. Learn how it works with QEMU and libvirt, and why many VPS providers rely on it.
By Maarten Soetens
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Connection Limits
Max connections MySQL sets how many clients can connect at once. Learn what database connections are, why 'too many connections' errors happen and fixes.
By Maarten Soetens
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What Is a Hypervisor?
A hypervisor is the software that creates and runs virtual machines. Learn how it shares CPU, memory, disk and network between guests, and what products use it.
By Maarten Soetens
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Full, Incremental and Differential
Full incremental differential backup compared on storage use, backup speed and restore complexity, including the restore chain each type needs.
By Maarten Soetens
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What Determines Domain Value
Domain value depends on length, extension, keywords, brandability and history. Learn the main factors and why automated appraisals are only estimates.
By Maarten Soetens