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The Cisco CCNA certification offers training and certification focused on the solutions and technologies needed implement and administer a broad range of modern networking and IT infrastructure.

Experience Virtual Classroom Live, our interactive online learning platform, with a quick tutorial and demonstration.

Introduces you to deploying applications in containers using Docker, Kubernetes, and OpenShift Enterprise by Red Hat.

The official Cisco CCNP Security FIREWALL training course (as well as other documentation) recommends enabling the inspection of the Internet Control Message Protocol (ICMP), even though it’s disabled by default. The image below displays the recommended practice as configured in ASDM, but the curious student might wonder what the unchecked “ICMP Error” box is. That’s what I’ll focus on in this post.