Which WLAN Security Policy Supports Open Link Authentication?
Short answer
D WEP is the only listed WLAN security policy that supports open link authentication, allowing association without credentials.
Question
Key Takeaways
The trap is confusing 'authentication' with 'encryption'. WEP allows open association (no auth) but uses weak encryption, whereas WPA2 requires strong authentication.
Identify the correct WLAN security policy supporting open link authentication. The answer is WEP, as it allows unauthenticated association.
Common mistake: Candidates often choose WPA or WPA2-PSK, assuming 'security' implies 'authentication'. However, these protocols require credentials, failing the 'open' criteria.
Expert Analysis
Understanding Open Link Authentication
The question asks which WLAN security policy supports "open link authentication." In Wi-Fi terminology, this refers to the Layer 2 association process where a client can associate with an Access Point (AP) without providing any credentials. This is distinct from encryption or higher-layer authentication.
Analysis of Options
- A. WPA / B. WPA2-PSK / C. WPA2-802.1X: These protocols are designed for secure wireless networks. They mandate authentication before data exchange. WPA/WPA2-PSK uses a Pre-Shared Key, and WPA2-802.1X uses an RADIUS server. While they technically allow association in some legacy configurations if misconfigured, their primary function and standard operation require authenticated keys. They do not natively support "open" (no credential) link authentication as a core security feature; rather, they enforce it.
D. WEP: Wired Equivalent Privacy (WEP) was the original IEEE 802.11 security standard. It supported two modes: "Open System" authentication and "Shared Key" authentication. In "Open System" mode, the authentication phase involves no actual cryptographic challenge-response that verifies identity; the client simply requests association, and the AP grants it. The WEP key is only used for encrypting/decrypting data frames after* association. Therefore, WEP explicitly supports open link authentication, allowing clients to connect without presenting credentials during the handshake, which makes it inherently insecure.
Conclusion
Among the choices, WEP is the only protocol that historically and technically includes "Open System" authentication as a defined mechanism. Comments correctly note that WEP allows this lack of credential requirement, which is precisely why it is considered weak. The other options (WPA/WPA2) are modern standards that require authentication keys, effectively negating the concept of "open" access in a security context.
Exam Strategy
When questions ask about 'open' or 'unauthenticated' access in WLAN contexts, look for legacy or insecure protocols like WEP or Open System. Modern standards like WPA2-WPA3 are built on mandatory authentication. Always distinguish between the authentication method (Layer 2) and the encryption method (Layer 2/3).
Frequently Asked Questions
What is open link authentication in Wi-Fi?
Why is WEP considered insecure regarding authentication?
Community Votes
67% of anonymous learners picked answer A. Votes are pick records left by other test-takers — they are not the verified answer.
Discussion 3 contributions
Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.
From public community threads 3
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cookie9999 👍 2 Answered AIts all 3 WPA , WEP and WPA2-802.1X
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branly 👍 1 Answered AEn resumen, todas las opciones A, B, C y D soportan la autenticación de enlace en modo abierto. Sin embargo, es importante mencionar que WEP no se recomienda debido a sus vulnerabilidades de seguridad. Para aplicaciones que requieren un nivel más alto de seguridad, se recomienda utilizar WPA, WPA2-PSK o WPA2-802.1X.
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Fmoura17 👍 1 Answered DAnswer: D. WEP Key Point Open authentication = no credentials required to associate. WEP was the early Wi-Fi security standard that allowed this, which is one reason it is considered weak and outdated.
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