Traditional Culture Encyclopedia - Traditional virtues - Why is MSTP physically isolated while MPLS is logically isolated?

Why is MSTP physically isolated while MPLS is logically isolated?

1, MSTP is mainly a technology of SDH, which is a traditional transmission technology, and like DDN, it uses different channels (time slots) to establish different links.

2, MPLS vpn is a Layer 3 technology, multiple vpn use the same physical link, there is no concept of time slots, but use RT attributes and things like RD, VRF, etc. for logical separation.