ICND1: Interconnecting Cisco Networking Devices Part 1 (CCENT, legacy) — Question 71

Which set of conditions comprises a successful ping attempt between two connected routers configured with IP addresses on the same subnet?

Answer options

• A. The destination host receives an echo reply from the source host within one second and the source host receives an echo request from the destination host.
• B. The destination host receives an echo request from the source host within one second.
• C. The destination host receives an echo reply from the source host within one second and the source host receives an echo reply from the destination host within two seconds.
• D. The destination host receives an echo request from the source host and the source host receives an echo request from the destination host within one second.
• E. The destination host receives an echo request from the source host and the source host receives an echo reply from the destination host within two seconds.

Correct answer: E

Explanation

Answer E is correct because for a successful ping, the source host must send an echo request and receive an echo reply from the destination host. The other options are incorrect as they either do not require both the request and reply or specify conditions that do not ensure a successful communication between the two routers.