Which of the following statements are TRUE about MPLS?
A.
MPLS is a tunneling technology that provides connection-oriented switching for the network layer based on IP routing and control protocols. It provides good QoS guarantee.
B.
MPLS labels, instead of IP routes, are looked up for forwarding packets, which greatly improves forwarding efficiency.
C.
MPLS forwarding is connectionless and cannot provide good end-to-end QoS guarantee.
D.
Labels used in MPLS forwarding can be manually configured or dynamically allocated using the Label Distribution Protocol (LDP).
The Answer Is:
A, B, D
This question includes an explanation.
Explanation:
MPLS (Multiprotocol Label Switching) is a tunneling technology that enables fast, efficient data forwarding based on labels rather than traditional IP routing. It providesconnection-orientedforwarding using label-switched paths (LSPs), ensuring reliableQuality of Service (QoS).
(A) True– MPLS is connection-oriented and enhances QoS by predefining LSPs through traffic engineering.
(B) True– MPLS useslabel switching, eliminating the need for IP lookups at each hop, significantly improving forwarding efficiency.
(C) False– MPLS is not connectionless; rather, it establishes virtual circuits (LSPs) for traffic. It providesend-to-end QoSthrough traffic prioritization.
(D) True– Labels in MPLS can be eithermanually assignedordynamically allocatedusing protocols likeLDP (Label Distribution Protocol)orRSVP-TE.
[Reference:HCSA-Presales-IP Network Official Study Guide, MPLS & QoS Chapter, , ]
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