Common Traps on Show IP Route Output Practice Questions
- ·Longest-prefix match is checked before administrative distance.
- ·Connected and local routes can appear alongside dynamic or static routes.
- ·The selected route may not be the one with the lowest metric if the prefix length differs.
Sample Questions
Practice all 11 →A network engineer is implementing OSPF on a router. All directly connected neighbors are listed with state FULL, but routes from another area are not appearing in the routing table. Which of the following is the most likely cause?
Explanation: When OSPF neighbors reach FULL state, the link-state database is synchronized. However, if routes from another area are missing, the issue is likely with the propagation of inter-area routes (Type 3 LSAs). An ACL configured to filter OSPF updates can block these LSAs. The router ID is required for OSPF operation but would prevent neighbor formation if missing. Virtual-links are only needed if an area is not directly connected to area 0. A corrupted link-state database is less likely than a simple ACL filter.
A network administrator is configuring OSPF on routers in a multi-area network. The administrator wants to ensure that a router in area 1 does not learn external routes (Type 5 LSAs) injected by an ASBR in area 0, but it must still learn inter-area routes (Type 3 LSAs). The administrator wants to reduce the routing table size. Which OSPF area type should be configured for area 1?
Explanation: A totally stubby area blocks Type 3 LSAs (inter-area summary routes) and Type 5 LSAs (external routes), and uses a default route only. A stub area blocks Type 5 LSAs but allows Type 3 LSAs. A not-so-stubby-area (NSSA) allows Type 7 LSAs for external routes and can also block Type 5 LSAs. The question says the router must learn inter-area routes (Type 3 LSAs) but not Type 5 LSAs; this matches the stub area definition. A totally stubby area would block Type 3 LSAs as well, which is not what is required.
A network administrator is creating a performance baseline for a new VoIP application. Which metric is most critical to monitor in order to ensure good voice quality for end users?
Explanation: VoIP is highly sensitive to latency. High latency causes noticeable delays in conversation, degrading the user experience. While jitter, packet loss, and bandwidth are also important, latency has the most direct impact on real-time communication quality. Ideally, all parameters should be monitored, but latency is the single most critical metric for voice quality.
A network administrator is configuring a monitoring system to collect metrics from network devices. The administrator needs to ensure that the monitoring system can automatically discover the devices and obtain detailed information about their configuration and status, such as interface descriptions and software versions. Which protocol is best suited for this purpose?
Explanation: SNMP (Simple Network Management Protocol) is used to gather information from network devices. SNMP can be used to poll devices (via GET requests) and receive traps. For automatic discovery and detailed configuration information, SNMP with MIB (Management Information Base) browsing is effective. LLDP is for discovering directly connected neighbors, not for pulling detailed config and status from many devices. NetFlow is for traffic analysis. Syslog is for log messages. SNMPv2c or v3 with appropriate MIBs allows polling interface descriptions, software versions, etc.
A network administrator is configuring dynamic routing between two routers in the same organization. The routers must support VLSM, converge quickly, and use a metric that is based on bandwidth and delay. Which routing protocol should be configured?
Explanation: EIGRP uses a composite metric that includes bandwidth, delay, reliability, and load by default. It supports VLSM and converges quickly using DUAL algorithm. OSPF also supports VLSM and converges quickly but uses cost as a metric (based on bandwidth). The question specifically mentions bandwidth and delay, which is the default metric for EIGRP. RIP supports only hop count and does not handle VLSM well. BGP is an exterior gateway protocol not intended for internal use.
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Frequently asked questions
How do "Show IP Route Output Practice Questions" appear on the real N10-009?
Practise interpreting routing-table output, route selection, administrative distance, metrics, next hops and longest-prefix match. These appear throughout the N10-009 and require you to apply your knowledge, not just recall facts.
How many scenario questions are on the N10-009 exam?
Cisco doesn't publish an exact breakdown, but scenario-based questions (especially exhibit and command-output formats) make up a significant portion of the N10-009. Practicing each scenario type ensures you're ready for any format.
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