Match each PPP establishment step with its appropriate sequence number:
| Step 1 | Send link-establishment frames to negotiate options such as MTU size, compression, and authentication. |
| Step 2 | Send configuration-acknowledgment frames. |
| Step 3 | Test link quality (optional). |
| Step 4 | Negotiate Layer 3 protocol options. |
| Step 5 | NCP reaches Open state. |
Related exam: EWAN v4 Chapter 2 Check Your Understanding: PPP
