What is a key disadvantage of Layer 3 Channel mode?

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The key disadvantage of Layer 3 Channel mode pertains to the lack of visibility of intra-VLAN traffic. This mode operates at Layer 3 of the OSI model, primarily focusing on routing traffic between different VLANs rather than monitoring or analyzing traffic within a single VLAN. As a result, communication that occurs solely within a VLAN does not get the same level of scrutiny or control as inter-VLAN traffic does. This can lead to potential security concerns, as malicious activities within a VLAN could go undetected since the Layer 3 Channel mode does not provide visibility into these intra-VLAN communications.

The other options present considerations that may also impact Layer 3 Channel mode, but they do not capture the specific limitation regarding intra-VLAN visibility. For instance, while it’s true that this mode may be more prone to errors without proper configuration, the specific lack of oversight on intra-VLAN traffic is a distinctive and critical disadvantage that can affect overall security posture. Similarly, although Layer 3 Channel mode requires VLAN tagging, this is a standard practice in networking that does not uniquely disadvantage this mode. Lastly, longer installation times might occur due to complexity, but this can vary widely based on the specifics of the deployment and is not an inherent disadvantage of the Layer

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