CCNP Security FAQ: TrustSec and MACSec Figure: MACSec Layer-2 hop-by-hop encryption. Q1. What is a security group tag? a. A luggage tag applied by TSA workers at airports to flag bags as they enter security checkpoints b. An internal assignment used in ISE to represent a local copy of an Active Directory group c. A 16-bit value that represents the context of a user … [Read more...]