What Is Xray? Xray Core with v2rayN and v2rayNG

Explains how Xray Core fits into desktop and mobile clients.

The core distinction

The service determines what endpoints you can reach; the client manages the connection; the core/protocol defines how traffic is established and routed. Mixing these concepts is a common source of setup errors.

What problem does it solve?

This page builds a vocabulary model instead of asking you to memorize parameters. In practice, confirm the client’s supported formats and follow current official documentation.

How does it relate to clients?

A client can support multiple cores or configuration formats, and one core can be used by multiple clients. A label such as “VLESS”, “Clash” or “sing-box” does not necessarily mean the software is the protocol or core itself.

Common misconceptions

• Assuming a product labeled “VPN” automatically secures every application.
• Publishing a subscription URL as if it were harmless.
• Ranking nodes by country alone.
• Running multiple traffic-interception clients at the same time.

Next step

Visit the Client Center, then read the subscription guide and system proxy vs TUN guide.