Exam 300-410 topic 1 question 121 discussion

While MPLS itself operates between Layer 2 (Data Link) and Layer 3 (Network), it is often referred to as a Layer 2.5 protocol because it operates in this space between the two layers.

A is correct Layer 2.5

yes, OPTION A layer 2.5 layer 1 layer2 ----->HERE MPLS 2.5 <------ because mpls is fasther control plane L3 layer3 layer4 layer5 layer 6 layer7

Ref: Multiprotocol Label Switching – Wikipedia “… Role and functioning MPLS operates at a layer that is generally considered to lie between traditional definitions of OSI Layer 2 (data link layer) and Layer 3 (network layer), and thus is often referred to as a layer 2.5 protocol. …” A. between Layer 2 and Layer 3 Correct answer. B. between Layer 5 and Layer 6 Wrong answer. C. between Layer 1 and Layer 2 Wrong answer. D. between Layer 3 and Layer 4 Wrong answer.