Icmp — CompTIA Network+ (N10-009) Practice Questions
ICMP, the Internet Control Message Protocol, is a Layer 3 protocol used to send error messages and operational information about network conditions between devices. On the Network+ N10-009 exam, ICMP is important because it underpins common tools like ping and traceroute, which are staples of network diagnostics. Candidates need to understand ICMP message types such as Echo Request, Echo Reply, Destination Unreachable, and Time Exceeded, and what each indicates about network behavior. ICMP is also relevant to security topics because it can be exploited for reconnaissance or denial-of-service attacks, and is often filtered at network boundaries.
Free questions on icmp
A network technician needs to test connectivity to a remote host but only wants to send one echo request instead of the default continuous ping. Which command should be used on Linux?
Free question · medium · full answer + explanation
More icmp questions in the full bank
- What is the purpose of ICMP? Unlock answer & explanation →
- You are troubleshooting network connectivity. A ping to a remote host fails, but a ping to the default gateway succeeds. What is the MOST likely issue? Unlock answer & explanation →
- A network monitoring tool shows that during a 10-minute traffic capture, the ratio of ICMP requests to ICMP replies is 1000:1. What is the most likely explanation? Unlock answer & explanation →