| Part number | Description |
|---|---|
| NS-500-UPG-A | NetScreen-500 Baseline to Advanced Upgrade License |
| NS-500-VSYS | 0 to 25 NetScreen-500 Virtual Systems Upgrade |
| NS-500-VSYS-10 | 5 to 10 NetScreen-500 Virtual System Upgrade |
| NS-500-VSYS-25 | 10 to 25 NetScreen-500 Virtual Systems Upgrade |
| NS-500-VSYS-5 | 0 to 5 NetScreen-500 Virtual System Upgrade |
