Which of the following regarding MPLS Encapsulation is FALSE?
Which of the following regarding MPLS Encapsulation is FALSE?
In MPLS (Multiprotocol Label Switching) encapsulation, for Layer 3 services, the customer's Layer 2 header is not preserved at the ingress Label Edge Router (iLER). Instead, the customer's data is encapsulated with the service provider's MPLS labels and Layer 2 headers. The correct answer is the statement that claims the customer's Layer 2 Header is preserved for Layer 3 services, which is false.
Answer is A.
A is True. C, D is True (it is MPLS on Ethernet so hop-by-hop provider's switches recreate L2 header, iLER too). B is False = for L2 tunnel iLER don't touch L2 header from client, it need to be the same at eLER.
B is False = for L3 tunnel L2 header from client is changed by VRF on iLER and eLER