Communication within a VLAN takes place at which layer of the OSI Model IP stack?

Question

Options

• APhysical Layer
• BTransport Layer
• CNetwork Layer
• DData-link Layer
• ESession Layer

• B
  3% (1)
• C
  3% (1)
• D
  94% (31)

Explanation

VLANs (Virtual Local Area Networks) operate at Layer 2 - the Data-link Layer because they use MAC addresses to segment and switch traffic within logically grouped broadcast domains, which is precisely the job of Layer 2 switches. The Physical Layer (A) is wrong because it only handles raw bit transmission with no awareness of logical groupings. The Transport Layer (B) and Session Layer (E) are too high up the stack - they deal with end-to-end connections and application sessions, not local network segmentation. The Network Layer (C) is where IP routing between different networks happens; VLANs don't require routing - traffic stays within the same VLAN without ever needing a Layer 3 device.

Memory tip: Think "VLAN = switch, switch = Layer 2." When traffic leaves a VLAN and goes to another, that's when a router or Layer 3 switch takes over. If it stays in the VLAN, it never leaves Layer 2.

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