Practise interpreting routing-table output, route selection, administrative distance, metrics, next hops and longest-prefix match.
Start Scenario PracticeR1 learns the route 192.0.2.0/24 via OSPF, RIP, and a static route configured with an administrative distance of 130. Based on this information, which two statements are correct?
Explanation: The router installs the OSPF route because it has the lowest administrative distance among the routes shown. The static route with AD 130 is intentionally floating, and the RIP route has a higher AD than OSPF. Route selection first prefers longest match, then lower AD among routes to the same prefix length.
A network administrator is troubleshooting a connectivity issue between two remote sites connected via a WAN link. Hosts on VLAN 10 at Site A (192.168.10.0/24) cannot ping the server at Site B (10.10.20.100). The router at Site A has a default route configured with the next-hop IP address 10.10.10.2. The administrator checks the routing table on Router A and notices that the default route is not installed. What is the most likely cause of the problem?
Explanation: Option D is correct because the default route uses a next-hop IP (10.10.10.2) and will only be installed in the routing table if that next-hop is reachable. Since the router’s routing table shows no default route, the most likely cause is that the next-hop 10.10.10.2 is unreachable, preventing the static route from being used. This explains why traffic fails despite the configuration.
A junior network engineer configured a floating static route on Router R1 to provide backup connectivity to a remote network 10.10.10.0/24. The primary connection uses OSPF. However, after the primary link fails, hosts on R1 cannot reach the remote network. The OSPF adjacency is down, and the floating static route is not appearing in the routing table. Based on the exhibit, what is the most likely cause of the issue?
Explanation: Option B is correct because the floating static route's next-hop becomes unreachable after the primary OSPF link fails. In the exhibit, the next-hop IP is likely configured to an address that is only reachable via OSPF; when that adjacency drops, the router has no route to the next-hop, so it cannot recursively resolve the static route. As a result, the route does not appear in the routing table. Option A is wrong because the route is present in the configuration (as a floating static route). Option C is wrong because the administrative distance of the floating static route is intentionally higher than OSPF's so that it only installs when OSPF fails; this is correct behavior. Option D is wrong because a default route would not override a more specific static route to 10.10.10.0/24.
Exhibit: A router has the following routes in its routing table: - OSPF: 10.1.1.0/24 - Static: 10.1.1.128/25 - Default: 0.0.0.0/0 A packet is destined for 10.1.1.130. Which route does the router use?
Explanation: Routers use longest-prefix match before they think about metrics. The /25 route for 10.1.1.128/25 is more specific than the /24 or the default route, so traffic for 10.1.1.130 follows that path.
Which three of the following statements about the routing table lookup process on a Cisco router are true? (Choose three.)
Explanation: The routing table uses longest prefix match (A) to find the most specific route. The default route (C) is used only when no other route matches. Directly connected routes (F) are automatically installed when the interface is up/up. Option D is incorrect because the router does recursively resolve the next‑hop IP when it is not directly connected.
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Practice all Show IP Route Output Practice QuestionsPractise interpreting routing-table output, route selection, administrative distance, metrics, next hops and longest-prefix match. These appear throughout the 200-301 and require you to apply your knowledge, not just recall facts.
Cisco doesn't publish an exact breakdown, but scenario-based questions (especially exhibit and command-output formats) make up a significant portion of the 200-301. Practicing each scenario type ensures you're ready for any format.
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