ROUTEGUESSER_
Read the routing table and pick the winning route before you run out of lives. Longest-prefix match, administrative distance, the route source codes in show ip route, and the default route — the exact decision logic the CCNA tests on every routing question.
★ ROUTING CHEAT NOTES
[ THE DECISION ORDER ]
1. Longest-prefix match — the most specific route that actually contains the destination wins, full stop. 2. Administrative distance — only breaks ties between routes of the same prefix length from different sources. 3. Metric — only compares routes from the same protocol. Default ADs: Connected 0 · Static 1 · eBGP 20 · EIGRP 90 · OSPF 110 · RIP 120 · EIGRP external 170 · iBGP 200. Route codes: C connected · L local · S static · O OSPF · D EIGRP · R RIP · B BGP.
The trap. A more specific prefix only wins if the destination is actually inside it. A /30 that does not contain the address loses to the /24 that does. AD never overrides a longer prefix — it only settles a tie when the prefix lengths are equal.
How to play. Pick Endless to survive on three lives, or Daily 10 for a fixed set that's the same for everyone today. Tap an answer or press 1-4. Every answer shows a one-line explanation.