Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 188

Which OSI model is used to insert an MPLS label?

Answer options

• A. between Layer 2 and Layer 3
• B. between Layer 5 and Layer 6
• C. between Layer 1 and Layer 2
• D. between Layer 3 and Layer 4

Correct answer: A

Explanation

The correct answer is A because MPLS (Multiprotocol Label Switching) operates between Layer 2 (Data Link) and Layer 3 (Network) of the OSI model, allowing it to effectively manage data traffic. Options B, C, and D are incorrect as they refer to layers that do not involve the insertion of MPLS labels.