L2VPN Atom Doubts

Hi fellas,

I am going through the configurations for L2VPN. There are two modes for
Attachment circuits

1. Port Mode ( Tagged Mode)
2. Untagged Mode

When a PE receives a VLAN Tagged frame ( say Vlan 100 ) from CE in its Port
Mode , it will preserve the CE tag based on two modes

1. Service Limiting
2. Service Delimiting

Wat is the difference between Service limiting and Service delimiting?

Can anyone explain me ?

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