🔗 DAC vs AOC: Which One Fits Your Data Center Needs?

As data centers scale up for higher speed and efficiency, choosing the right cabling is crucial. Two popular options for short-range connections are DAC (Direct Attach Cable) and AOC (Active Optical Cable). But which one is right for your setup?

Let’s break it down 👇

⚙️ What is DAC? (Direct Attach Cable)

• Type: Copper-based cable with transceiver ends

• Data Rate: Supports 10G to 400G

• Typical Reach: Up to 7 meters

• Connector: Passive or Active transceivers (SFP, QSFP, etc.)

• Use Case: In-rack or adjacent rack connections

✅ Pros:

• Cost-effective

• Low power consumption

• Low latency

❌ Cons:

• Limited distance

• Bulkier cable

🔌 What is AOC? (Active Optical Cable)

• Type: Fiber-based cable with built-in optics

• Data Rate: Supports 10G to 400G+

• Typical Reach: Up to 100 meters

• Connector: Integrated optical transceivers

• Use Case: Between racks, rows, or across data halls

✅ Pros:

• Longer reach

• Lightweight and flexible

• Immune to EMI (Electromagnetic Interference)

❌ Cons:

• Higher cost

• Slightly higher power usage

📊 Quick Comparison Table

💡 Which One to Choose?

• Choose DAC if:

• You need a cost-effective, low-latency solution for short distances (inside the rack)

• Choose AOC if:

• You need more flexibility and longer reach (between racks or across rooms)

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