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Question 77 of 1,420
mediumDrag & DropObjective-mapped
350-401 Practice Question: Drag and drop the steps of the 802.1X/EAP…
Drag and drop the steps of the 802.1X/EAP authentication process for a wireless client into the correct order, from first to last.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Client sends EAPoL-Start to AP
The correct order is: 1. Client sends EAPoL-Start to the AP (A). 2. AP sends EAP-Request Identity (B). 3. Client sends EAP-Response Identity (C). 4. RADIUS sends EAP-Request credentials (D). 5. Client sends EAP-Response credentials (E). This sequence is standard for 802.1X/EAP wireless authentication.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Client sends EAPoL-Start to AP
Why this is correct
Correct first step. The client initiates the 802.1X process by sending an EAPoL-Start frame to the access point.
- ✓
AP sends EAP-Request Identity
Why this is correct
Correct second step. The AP responds by sending an EAP-Request Identity frame to request the client's identity.
- ✓
Client sends EAP-Response Identity
Why this is correct
Correct third step. The client sends its identity in an EAP-Response Identity frame to the AP, which forwards it to the RADIUS server.
- ✓
RADIUS sends EAP-Request credentials
Why this is correct
Correct fourth step. The RADIUS server sends an EAP-Request for credentials (such as a password) to the client via the AP.
- ✓
Client sends EAP-Response credentials
Why this is correct
Correct fifth step. The client sends its credentials in an EAP-Response to the RADIUS server via the AP.
Quick reference
AAA Protocol Comparison
| Protocol | Port(s) | Encryption | Transport | Primary Use |
|---|---|---|---|---|
| RADIUS | 1812 / 1813 | Password only | UDP | Network access control |
| TACACS+ | 49 | Full packet | TCP | Device administration |
| Diameter | 3868 | Full session | TCP / SCTP | Carrier / mobile networks |
| 802.1X | — | EAP-based | Layer 2 | Port-based access control |
TACACS+ encrypts the entire packet; RADIUS only encrypts the password field — a key exam distinction.
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Last reviewed: Jun 18, 2026
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