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300-410 Practice Question: Which TWO statements about MPLS Traffic…
Which TWO statements about MPLS Traffic Engineering (MPLS-TE) are true? (Choose TWO.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
MPLS-TE uses RSVP-TE to signal label-switched paths (LSPs) and reserve bandwidth.
MPLS-TE allows explicit path selection using RSVP-TE to reserve bandwidth and set up LSPs. The 'show mpls traffic-eng tunnels' command displays tunnel status. Option A is correct: RSVP-TE is the signaling protocol used for MPLS-TE. Option B is correct: 'show mpls traffic-eng tunnels' is a valid verification command. Option C is false: MPLS-TE does not use LDP; it uses RSVP-TE. Option D is false: MPLS-TE uses the Resource Reservation Protocol (RSVP) for signaling, not BGP. Option E is false: MPLS-TE does not require a full mesh of IBGP sessions; it uses IGP with TE extensions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
MPLS-TE uses RSVP-TE to signal label-switched paths (LSPs) and reserve bandwidth.
Why this is correct
Correct. RSVP-TE is the standard signaling protocol for MPLS-TE.
- ✓
The command 'show mpls traffic-eng tunnels' displays the status of MPLS-TE tunnels.
Why this is correct
Correct. This command shows tunnel state, bandwidth, and path information.
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MPLS-TE uses LDP to distribute labels for the TE tunnels.
Why it's wrong here
Incorrect. MPLS-TE uses RSVP-TE for label distribution, not LDP.
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MPLS-TE requires BGP to carry the TE attributes across the network.
Why it's wrong here
Incorrect. MPLS-TE uses IGP (OSPF or IS-IS) with TE extensions to distribute TE attributes.
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MPLS-TE requires a full mesh of IBGP sessions between all routers.
Why it's wrong here
Incorrect. MPLS-TE does not require a full IBGP mesh; it relies on IGP TE extensions.
Go deeper
Related to this question
Learn chapter
BGP Route Selection and Policy
Key term
LDP Protocol
LDP, or Label Distribution Protocol, is a protocol that routers use to automatically exchange labels that enable MPLS (Multiprotocol Label Switching) to create fast, efficient paths for data packets across a network.
Key term
MPLS Label Distribution
MPLS Label Distribution is the process by which routers exchange labels that tell them how to forward packets across a network without looking at the IP address each time.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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