Session Layer vs Application Layer | FIX Protocol Explained

Think FIX is only about orders? Think again 😳

FIX Protocol has two important layers:

⚡ Session Layer → keeps systems connected
📩 Application Layer → sends actual trading messages

Session Layer handles:

🔌 Connectivity
💓 Heartbeats (35=0)
⚠️ Test Requests (35=1)
🔁 Sequence numbers & session recovery

Application Layer handles:

📈 New Orders (35=D)
📊 Execution Reports (35=8)
❌ Order Cancel Requests (35=F)
📩 Trading workflows

Simple rule:

❌ No Session Layer = No FIX communication
✅ Connection alive = trading messages can flow

This is how real electronic trading systems work behind the scenes 🚀

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Видео Session Layer vs Application Layer | FIX Protocol Explained канала Vishal Nagpal - TechIntel AI