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Exam 300-320 topic 1 question 73 discussion

Actual exam question from Cisco's 300-320
Question #: 73
Topic #: 1
[All 300-320 Questions]

An engineer is attempting to improve OSPF network performance and discovers that the entire SPT recomputes whenever a type 1 or type 2 LSA is received within an area.
Which action can optimize SPT operations?

  • A. Tune LSA throttling thresholds.
  • B. Enable incremental SPF.
  • C. Configure totally stubby areas throughout the domain.
  • D. Summarize networks on all ABRs.
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Suggested Answer: B 🗳️
by Scheldon at Oct. 29, 2019, 2:37 p.m.

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Scheldon
5 years, 8 months ago
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/15-sy/iro-15-sy-book/iro-incre-spf.pdf OSPF uses Dijkstra’s SPF algorithm to compute the shortest path tree (SPT). During the computation of the SPT, the shortest path to each node is discovered. The topology tree is used to populate the routing table with routes to IP networks. When changes to a Type-1 or Type-2 link-state advertisement (LSA) occur in an area, the entire SPT is recomputed. In many cases, the entire SPT need not be recomputed because most of the tree remains unchanged. Incremental SPF allows the system to recompute only the affected part of the tree.
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Scheldon
5 years, 8 months ago
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/15-sy/iro-15-sy-book/iro-incre-spf.pdf OSPF uses Dijkstra’s SPF algorithm to compute the shortest path tree (SPT). During the computation of the SPT, the shortest path to each node is discovered. The topology tree is used to populate the routing table with routes to IP networks. When changes to a Type-1 or Type-2 link-state advertisement (LSA) occur in an area, the entire SPT is recomputed. In many cases, the entire SPT need not be recomputed because most of the t
upvoted 1 times
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