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300-420 · Question #107

Refer to the exhibit. Which two solutions maximize the use of the links between the core and distribution layers? (Choose two.)

The correct answer is A. use multiple equal-cost links B. use an IGP. 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.)

Exhibit

300-420 question #107 exhibit

Options

  • Ause multiple equal-cost links
  • Buse an IGP
  • Cuse HSRP
  • Duse RPVSTP+
  • Euse multiple unequal-cost links

How the community answered

(22 responses)
  • A
    77% (17)
  • C
    5% (1)
  • D
    5% (1)
  • E
    14% (3)

Why each option

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.

Ause multiple equal-cost linksCorrect

Using multiple equal-cost links allows routing protocols to distribute traffic across all available paths, enabling load balancing and thus maximizing the utilization of network bandwidth.

Buse an IGPCorrect

An IGP like OSPF or EIGRP dynamically builds routing tables and supports Equal-Cost MultiPath (ECMP), which is essential for identifying and utilizing multiple equal-cost links to spread traffic efficiently across the network infrastructure.

Cuse HSRP

HSRP provides first-hop redundancy but typically keeps one link active at a time, which does not maximize the utilization of all available links.

Duse RPVSTP+

RPVSTP+ prevents Layer 2 loops by blocking redundant paths, which inherently *reduces* overall link utilization for the sake of loop prevention.

Euse multiple unequal-cost links

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

Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-mt/ire-15-mt-book/ire-ecmp.html

Topics

#Load Balancing#ECMP#IGP#Campus Network Design

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