MPLS
networkingMultiprotocol Label Switching — a routing technique that directs data using short path labels rather than long network addresses.
Pronunciation
Correct
M-P-L-S
/ɛmpiːɛlɛs/
Each letter is pronounced individually: M-P-L-S. Stands for Multiprotocol Label Switching.
Source: www.rfc-editor.org(official spec)