What are the primary components of an 802.1X authentication framework? (Select two.)

Question

Options

• ASupplicant (End DevicE.
• BAuthenticator (Network DevicE.
• CVLAN Trunking Protocol (VTP)
• DSpanning Tree Protocol (STP)

• A
  93% (13)
• D
  7% (1)

Explanation

802.1X is a port-based Network Access Control (NAC) protocol that relies on three core roles: the Supplicant (the end device requesting access), the Authenticator (the network device - switch or AP - that enforces access), and the Authentication Server (typically a RADIUS server). Options A and B are correct because without the supplicant and authenticator, the 802.1X exchange cannot occur - they form the two endpoints of the EAP conversation.

C (VTP) is wrong because VLAN Trunking Protocol manages VLAN database propagation between switches - it has nothing to do with authentication or identity verification. D (STP) is wrong because Spanning Tree Protocol prevents Layer 2 loops in a network - again, unrelated to access control or authentication frameworks.

Memory tip: Think of 802.1X as a nightclub scenario - the Supplicant is the person trying to get in, the Authenticator is the bouncer at the door, and the RADIUS server is the VIP list. VTP and STP are backstage infrastructure - they keep the venue running but have no say in who gets through the door.

No community discussion yet for this question.