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MPLS Path Calculation Methods Quiz

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Questions and Answers

What is the main benefit of constraint-based routing in MPLS networks?

Enabling hop-by-hop routing

Enhancing fast fault recovery

Preventing inconsistencies in path computation (correct)

Improving differentiated services provision

In MPLS networks, what is the primary function of the Label Distribution Protocol (LDP)?

Carrying information about the route to be followed

Associating the label with a Forwarding Equivalence Class (FEC) (correct)

Providing quality-assured service

Ensuring fast fault recovery

How does MPLS differ from hop-by-hop routing in terms of path calculation?

MPLS uses multiple routers for path calculation

MPLS selects paths based on link loads only

MPLS allows for path calculations based on real-time traffic data

MPLS relies on a single router for consistent path calculation (correct)

Which protocol is primarily responsible for traffic engineering in MPLS networks?

RSVP-TE Signup and view all the answers

What is the function of an LER in an MPLS network?

Assign the MPLS label to the packet based on its destination and requested service type Signup and view all the answers

What is the role of an LSR in MPLS networks?

Determine the path a packet will take through the network based on labels Signup and view all the answers

What does LFIB stand for in an MPLS context?

Label Forwarding Information Base Signup and view all the answers

In MPLS, what is the purpose of Label Switching?

To forward packets based on labels rather than IP headers Signup and view all the answers

Why is BGP typically not used for constraint-based routing in MPLS networks?

BGP is designed for inter-domain routing, not for constraint-based routing within a domain Signup and view all the answers

What is the main reason behind avoiding RIP in large-scale MPLS networks?

RIP has scalability limitations in large networks Signup and view all the answers

How does explicit constraint-based routing in MPLS differ from hop-by-hop routing?

In explicit routing, each router determines the entire path beforehand, unlike hop-by-hop routing Signup and view all the answers

What role does the Label Distribution Protocol (LDP) play in MPLS networks?

LDP establishes Label-Switched Paths (LSPs) by distributing labels to routers Signup and view all the answers