Which of the following VLAN membership types is considered explicit in its propogation?

Question

Options

• AMAC address-based
• BApplication-based
• CSession-based
• DProtocol-based

• A
  3% (1)
• B
  3% (1)
• C
  5% (2)
• D
  89% (33)

Explanation

Protocol-based VLAN membership is considered explicit because it assigns frames to VLANs based on the Layer 2/3 protocol identifier (Ethertype) that is directly and unambiguously present in every frame header - the membership rule is declared by the traffic itself, not inferred or looked up externally.

MAC address-based (A) is incorrect because membership is determined by consulting a learned address table, which is an implicit, database-driven lookup rather than something embedded in the frame's protocol structure. Application-based (B) requires deep packet inspection to infer intent, making it implicit and context-dependent. Session-based (C) relies on transient, stateful context that must be tracked externally, which is the opposite of explicit.

Memory tip: Think "protocol = printed on the label." The Ethertype field explicitly states the protocol in every single frame - like a shipping label that always tells you exactly what's inside, no guessing required.

No community discussion yet for this question.