ProxyHorizon Glossary
The Proxy & Networking Glossary
Plain-language definitions of the proxy, VPN, scraping and networking terms you'll run into — explained simply, with examples and use cases.
88 terms and counting
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Plain-language definitions of the proxy, VPN, scraping and networking terms you'll run into — explained simply, with examples and use cases.
88 terms and counting
A CDN is a network of servers spread across the globe that stores copies of website content close to users for faster loading. It also protects sites by absorbing traffic spikes and filtering malicious requests.
CGNAT is a technique carriers use to share one public IP among many customers — which is exactly why mobile proxy IPs are so trusted and hard to block.
IP reputation is a trust score that websites and security systems assign to an IP address based on its past behavior. A clean IP is trusted, while a flagged one may be blocked or challenged.
IP whitelisting is a security method that only lets pre-approved IP addresses connect to a service, blocking everyone else by default.
IPv4 is the 32-bit addressing system most of the internet still runs on, giving every device a number like 203.0.113.42. Its roughly 4.3 billion addresses ran out years ago, which is why clean IPv4 is scarce and expensive.
IPv6 is the 128-bit successor to IPv4, built to end the address shortage rather than work around it. Addresses are effectively unlimited and nearly free — but only useful against targets that actually support it.
A port number is a numeric label that directs network traffic to the right program on a device. Combined with an IP address, it tells data exactly where to go.
Proxy authentication is the process of proving you are allowed to use a proxy, usually with a username and password or by approving your IP address in advance.
A proxy server is a middleman between you and the internet. Your request goes to the proxy first, and the proxy forwards it on — so the website sees the proxy's IP address instead of yours.