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Network+ Guide to Networks (MindTa...

8th Edition
Jill West + 2 others
Publisher: Cengage Learning
ISBN: 9781337569330

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BuyFindarrow_forward

Network+ Guide to Networks (MindTa...

8th Edition
Jill West + 2 others
Publisher: Cengage Learning
ISBN: 9781337569330
Chapter 12, Problem 10RQ
Textbook Problem
51 views

Where does an MPLS label go in a PDU?

  1. a. Layer l
  2. b. Between Layers 2 and 3
  3. c. Between Layers l and 2
  4. d. Layer 3

Program Description Answer

MLPS label goes in a Protocol Data Unit (PDU) “between Layers 2 and 3”.

Hence, the correct answer is option “B”.

Explanation of Solution

MLPS:

  • Multiprotocol Label Switching (MPLS) is a technique that facilitates a router to shift data from one path to another path.
  • To perform this, one or more labels are enclosed toward the front of an IP packet.
  • Each label includes four fields.
  • As the name implies, it enables multiple types of Layer 3 protocols and proceed to any of the connection-oriented Layer 2 protocols.
  • Layer 2 makes the transmission of data reliable, which is provided by the physical layer. For reliable transfer, it divides the data into data frames and transmits through the communication channel.
  • Layer 3 performs the routing of packet from source to destination. For routing, it converts the data into packets, and after reaching the destination, it converts back to the data...

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