Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) — Question 650

What is a difference between OSPF and EIGRP?

Answer options

• A. OSPF uses a default hello timer of 5 seconds. EIGRP uses a default hello timer of 10 seconds.
• B. OSPF uses multicast addresses 224.0.0.5 and 224.0.0.6. EIGRP uses multicast address 224.0.0.10.
• C. OSPF uses an administrative distance of 115. EIGRP uses an administrative distance of 160.
• D. OSPF uses IP protocol number 88. EIGRP uses IP protocol number 89.

Correct answer: B

Explanation

The correct answer is B because OSPF indeed uses multicast addresses 224.0.0.5 and 224.0.0.6 for sending updates, while EIGRP uses 224.0.0.10. Option A is incorrect as OSPF's default hello timer is actually 10 seconds, not 5. Option C is wrong since EIGRP has a lower administrative distance than OSPF, and Option D is incorrect as both protocols use different IP protocol numbers but the numbers provided are not the correct ones for EIGRP and OSPF.