(ISC)2 Certified in Cybersecurity Practice Exam

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What is it known when a ping request is successfully sent?

ICMP Echo Reply
ICMP Echo Response
ICMP Echo Request
ICMP Echo Init

The correct answer is: ICMP Echo Request

When a ping request is successfully sent, it is known as an ICMP Echo Request. This is a fundamental concept in network diagnostics and communications protocol. Ping operates using the Internet Control Message Protocol (ICMP), which is designed for sending error messages and operational information. When a device wants to check the reachability of another device on the network, it sends an ICMP Echo Request. If the target device is reachable and functioning correctly, it will reply with an ICMP Echo Reply. This two-step process is crucial for network administrators to diagnose connectivity issues and understand network performance. Understanding this process is essential as it helps differentiate between the request and the response involved in the ping operation, with the Echo Request being the initial action undertaken in the diagnostic procedure.