Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) — Question 945

What is a difference between OSPF and EIGRP?

Answer options

• A. OSPF is an advanced distance vector protocol. EIGRP is a link-state protocol.
• B. OSPF is a hybrid routing protocol. EIGRP is a link-state routing protocol.
• C. OSPF uses the DUAL algorithm. EIGRP uses the SPF algorithm.
• D. OSPF uses an administrative distance of 110. EIGRP uses an administrative distance of 170.

Correct answer: D

Explanation

The correct answer, D, indicates that OSPF and EIGRP have different administrative distances, which are key to their routing decision processes. A is incorrect because OSPF is a link-state protocol, not an advanced distance vector protocol. B is also wrong since EIGRP is not a link-state routing protocol but rather a hybrid one. C is incorrect as well; OSPF uses the SPF algorithm, not DUAL, which is exclusive to EIGRP.