Drag and drop each trunk encapsulation on the left to its matching standard on the right.
Drag a concept onto its matching description — or click a concept then click the description.
Cisco proprietary, encapsulates entire frame with 30-byte header; Does not support native VLAN concept
IEEE standard, inserts 4-byte tag into frame; Supports up to 4094 VLANs
Untagged frames on trunk port
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
ISL: Cisco proprietary, encapsulates entire frame with 30-byte header
ISL is Cisco proprietary with 30-byte header; 802.1Q is IEEE standard with 4-byte tag; only 802.1Q supports native VLAN; ISL encapsulates entire frame.
Visual reference
Go deeper
About these practice questions
One of 1,175 original 350-401 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-401 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 350-401 exam.