When a host cannot reach something, its own IP settings are one of the first things to check. Four problems appear again and again on the CCNA: a wrong subnet mask, a default gateway that is not in the host's subnet, two devices using the same address, and a host that failed to get an address from DHCP (Dynamic Host Configuration Protocol) and gave itself an APIPA (Automatic Private IP Addressing) address. Each has a recognizable symptom pattern, so once you know the patterns you can diagnose them from a single output.
Free account
Keep reading for free
Create a free StudyToCert account to read the rest of this lesson: 7 more sections, 6 key terms, a real-world example, an exam tip and self-check questions. Every lesson, lab and practice test is free with an account.