What is the size of the SGT field in the metadata header?
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Correct answer: 16 bits.
Why this is the answer
The SGT (Security Group Tag) field in the metadata header is 16 bits long. This 16-bit value is used to identify a specific security group, allowing for policy enforcement based on group membership rather than IP addresses. This is a fundamental component of Cisco's TrustSec solution, enabling granular access control. An 8-bit field would be too small to support a sufficient number of unique security groups for most enterprise deployments. While 24 or 32 bits would offer more capacity, 16 bits provides an optimal balance between the number of available SGTs (65,536 unique tags) and header overhead.
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