This 350-701 practice question tests your understanding of security concepts. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which Cisco TrustSec feature uses a classification packet to carry security group information across network devices?
Security Group Tag (SGT)
SGTs are inserted into packets to carry group information.
Security Group Access Control List (SGACL)
Why wrong: SGACLs are policies applied based on SGTs, not the classification packet.
MACsec
Why wrong: MACsec provides encryption, not group classification.
Cisco TrustSec (CTS)
Why wrong: CTS is the framework, not the classification tag.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Security Group Tag (SGT)
The Security Group Tag (SGT) is the Cisco TrustSec mechanism that embeds security group information directly into a packet's Ethernet frame (typically as a Cisco Meta Data or inline tag). This allows the packet to carry its source group identity across network devices, enabling consistent policy enforcement without requiring per-hop reclassification.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Security Group Tag (SGT)
Why this is correct
SGTs are inserted into packets to carry group information.
Related concept
Read the scenario before looking for a memorised answer.
Security Group Access Control List (SGACL)
Why it's wrong here
SGACLs are policies applied based on SGTs, not the classification packet.
MACsec
Why it's wrong here
MACsec provides encryption, not group classification.
Cisco TrustSec (CTS)
Why it's wrong here
CTS is the framework, not the classification tag.
Common exam traps
Cisco often tests the distinction between the tag that carries the group information (SGT) and the policy that enforces rules based on that tag (SGACL), so candidates mistakenly choose SGACL because they associate it with security group enforcement.
Detailed technical explanation
SGTs are typically inserted as a 16-bit value in the Cisco Meta Data (CMD) header between the Ethernet and IP headers, or as an inline tag in the EtherType field (0x8909). In a software-defined access (SD-Access) fabric, SGTs are propagated via VXLAN encapsulation, allowing end-to-end micro-segmentation even across Layer 3 boundaries. A real-world scenario is a hospital network where an SGT for 'Nurse' devices allows access to patient records while an SGT for 'Visitor' devices blocks that access, with the tag persisting across switches and routers.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
What to study next
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FAQ
Security Concepts — This question tests Security Concepts — Read the scenario before looking for a memorised answer..
The correct answer is: Security Group Tag (SGT) — The Security Group Tag (SGT) is the Cisco TrustSec mechanism that embeds security group information directly into a packet's Ethernet frame (typically as a Cisco Meta Data or inline tag). This allows the packet to carry its source group identity across network devices, enabling consistent policy enforcement without requiring per-hop reclassification.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
This 350-701 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-701 exam.
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