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+VMs (Virtual Machines):
+
+Virtualize hardware, including a complete OS for each VM.
+High resource usage (memory, CPU, storage).
+Strong isolation.
+Slower startup.
+Less portability due to larger images.
+Docker Containers:
+
+Virtualize the OS, sharing the host OS kernel.
+Low resource usage.
+Application-level isolation.
+Almost instant startup.
+Highly portable, small image sizes. 
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