Where are MPLS labels placed within a frame?
A) between the layer 3 header and the data payload
B) between the data payload and the layer 2 trailer
C) between the layer 2 header and the layer 3 header
D) at the end of the layer 2 trailer

Question

Quizplus · Accepted Answer

MPLS labels are inserted between the Layer 2 header and the Layer 3 header. This is done to avoid any changes to the Layer 3 header and to allow the MPLS network to forward packets based on the label instead of the IP header. The MPLS label is added as a shim header between the existing Layer 2 and Layer 3 headers.

Where Are MPLS Labels Placed Within a Frame