CCNA Exam Preparation / Network fundamentals
CCNA technique 034: ARP and Ethernet — practice and verify
An original CCNA exercise on arp and ethernet with predictions, evidence, and a changed-condition check.
Environment and inputs: CCNA 200-301 v1.1 study; isolated Cisco IOS / IOS XE lab or paper exercise where applicable.
Practice task
For a remote destination identify which address the sender ARPs for and inspect its ARP cache.
Expected reasoning
ARP resolves a local IPv4 next-hop address to a link-layer address, not a remote server's MAC across routers.
Produce evidence
Use an isolated simulator, approved lab or paper trace. Record the topology, prediction and observed result. Before device changes, capture the relevant interface, route, neighbor or service state. Ping alone may not prove the behavior under study.
Introduce a counterexample
Change one condition in the arp and ethernet exercise and predict the result before checking it. Explain which observation would disprove your hypothesis. Restore the baseline, repeat from blank notes and keep both results.
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.