Cisco 200-125 Exam

Which statement about MPLS is true?

  • A. It operates in Layer 1.
  • B. It operates between Layer 2 and Layer 3.
  • C. It operates in Layer 3.
  • D. it operates in Layer 2.
Answer: Option B.
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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