Which statement about MPLS is true?
- It operates in Layer 1.
- It operates between Layer 2 and Layer 3.
- It operates in Layer 3.
- It operates in Layer 2.
Explanation: MPLS belongs to the family of packet-switched networks. MPLS operates at a layer that is generally considered to lie between traditional definitions of OSI Layer 2 (data link layer) and Layer 3 (network layer), and thus is often referred to as a layer 2.5 protocol.
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