Connecting an Xbox 360 to Xbox Live wirelessly depends on your **console model**:
**Built-in Wi-Fi (802.11n).**
**No built-in Wi-Fi.** You need the **Xbox 360 Wireless Network Adapter** (Black USB dongle, model X8187 / X8187-1). **Discontinued.** Buy used (eBay, $25–40).
Alternative (All Models): Ethernet Cable. Direct to router. Best stability, speed, NAT. 100ft Cat6 = $15.
Microsoft **ended Xbox 360 Xbox Live support for most titles** (matchmaking, parties, marketplace) but **core services (sign-in, profile, backward compat auth, some game servers)** remain. Many games (CoD, Halo, Gears) have **private / dedicated servers still up**. Check Xbox 360 Live Game Status.
That’s for connecting **Xbox 360/One/Series controllers** to a **PC**. Not for console internet.