The strategy is decided; this is the mechanics. Exam policies differ by vendor — how you schedule, how much notice you need to reschedule without losing your fee, whether a failed attempt costs full price and how long you must wait, and what an online-proctored exam requires. Here is each vendor's, sourced and dated. Policies change; confirm current terms before you book.
| Vendor | Testing provider | Details |
|---|---|---|
| AWS | Pearson VUE | see page |
| Cisco | Pearson VUE | see page |
| CompTIA | Pearson VUE | see page |
| EC-Council | EC-Council exam portal / Pearson VUE | see page |
| ISACA | PSI | see page |
| ISC2 | Pearson VUE (test centers) | see page |
| Linux Foundation / CNCF | PSI Bridge | see page |
| Microsoft | Pearson VUE | see page |
| PMI | Pearson VUE | see page |
| Red Hat | Red Hat (own delivery) | see page |