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300-420 · Question #107
300-420 Question #107: Real Exam Question with Answer & Explanation
The correct answer is A: use multiple equal-cost links. To maximize link utilization between core and distribution layers, using multiple equal-cost links along with an Interior Gateway Protocol (IGP) is the most effective approach.
Advanced Enterprise Campus Networks
Question
Refer to the exhibit. Which two solutions maximize the use of the links between the core and distribution layers? (Choose two.)
Options
- Ause multiple equal-cost links
- Buse an IGP
- Cuse HSRP
- Duse RPVSTP+
- Euse multiple unequal-cost links
Explanation
To maximize link utilization between core and distribution layers, using multiple equal-cost links along with an Interior Gateway Protocol (IGP) is the most effective approach.
Common mistakes.
- C. HSRP provides first-hop redundancy but typically keeps one link active at a time, which does not maximize the utilization of all available links.
- D. RPVSTP+ prevents Layer 2 loops by blocking redundant paths, which inherently reduces overall link utilization for the sake of loop prevention.
- E. Using multiple unequal-cost links would typically result in traffic preferring lower-cost paths, potentially underutilizing higher-cost links unless specific load-sharing mechanisms are configured.
Concept tested. Network design, load balancing, IGP, link utilization
Topics
#Load Balancing#ECMP#IGP#Campus Network Design
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