CCNA Exam Preparation / IPv4 and IPv6 addressing
CCNA technique 047: Private IPv4 ranges — explain the decision
Explain private ipv4 ranges clearly, test your assumptions, and build a reusable CCNA recall routine.
Environment and inputs: CCNA 200-301 v1.1 study; isolated Cisco IOS / IOS XE lab or paper exercise where applicable.
Understand the distinction
RFC 1918 private space is not the same thing as all non-public address space.
Retrieve before reading
Close your notes and explain private ipv4 ranges in your own words. Draw the packet path, decision steps or study workflow. State when the explanation applies; a command or definition alone is not enough.
Apply it to a fresh example
Classify 10.1.1.1, 172.31.1.1, 172.32.1.1, and 192.168.1.1 and explain the boundary at 172.16/12.
Check your reasoning
Check your answer against the Cisco reference and lab evidence. Record the first incorrect assumption. Change one input, predict the new result and check it. Repeat later from blank notes.
Exam scope
Independent CCNA 200-301 v1.1 exercise, checked against Cisco resources on 2 November 2026. It is not a recalled exam question. The collection’s 200 techniques do not represent exam question counts or weights. Check Cisco’s current exam rules and your simulator’s supported syntax.