350-401 Question #653: Real Exam Question with Answer & Explanation

Question

How do EIGRP metrics compare to OSPF metrics?

Options

• AEIGRP metrics are based on a combination of bandwidth and packet loss, and OSPF metrics are
• BEIGRP uses the Dijkstra algorithm, and OSPF uses The DUAL algorithm
• CThe EIGRP administrative distance for external routes is 170, and the OSPF administrative
• DThe EIGRP administrative distance for external routes is 170, and the OSPF administrative

Explanation

EIGRP and OSPF differ in their administrative distances, with EIGRP external routes having an AD of 170 and OSPF external routes typically having an AD of 110.

Common mistakes.

• A. EIGRP metrics primarily consider bandwidth and delay, along with reliability and load, not primarily packet loss; OSPF metrics are based on link cost.
• B. This statement is incorrect; EIGRP uses the DUAL (Diffusing Update Algorithm) while OSPF uses the Dijkstra (Shortest Path First) algorithm.
• C. This option is truncated but likely contains incorrect information or a less accurate comparison compared to D, assuming D completes as described.

Concept tested. EIGRP and OSPF administrative distances

Reference. https://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/16406-eigrp-toc.html

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