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Question 488 - N10-008 discussion

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Which of the following protocols uses Dijkstra’s algorithm to calculate the LOWEST cost between routers?

A.
RIP
Answers
A.
RIP
B.
OSPF
Answers
B.
OSPF
C.
BGP
Answers
C.
BGP
D.
EIGRP
Answers
D.
EIGRP
Suggested answer: B

Explanation:

OSPF stands for Open Shortest Path First and is a link-state routing protocol that uses Dijkstra’s algorithm to calculate the lowest cost between routers. OSPF assigns a cost value to each link based on factors such as bandwidth, delay, or reliability, and builds a map of the network topology. OSPF then uses Dijkstra’s algorithm to find the shortest path from each router to every other router in the network1. RIP stands for Routing Information Protocol and is a distance-vector routing protocol that uses hop count as the metric to find the best path. BGP stands for Border Gateway Protocol and is a path-vector routing protocol that uses attributes such as AS path, local preference, or origin to select the best route. EIGRP stands for Enhanced Interior Gateway Routing Protocol and is a hybrid routing protocol that uses a composite metric based on bandwidth, delay, load, and reliability.

Reference: 1 Dijkstra’s algorithm - Wikipedia (https://en.wikipedia.org/wiki/Dijkstra%27s_algorithm)

asked 02/10/2024
Haider Nassiry
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