Practice Test Geeks(ICND1) Interconnecting Cisco Networking Devices Part 1 Practice Test
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Routing Technologies & Protocols Flashcards

7 cards from real ICND1 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which feature prevents routing loops in distance-vector protocols by not advertising a route back out the interface from which it was learned?

    Answer: Split horizon

    Split horizon prevents routing loops by prohibiting a router from advertising a route back on the same interface it was received from.

  2. An EIGRP router loses its successor route and there is no feasible successor. What process does EIGRP initiate?

    Answer: It marks the route as possibly down and sends Query messages to neighbors

    When no feasible successor exists, EIGRP enters Active state for that route and sends Query messages to all neighbors to find an alternative path.

  3. Which command configures a default route on a Cisco router and forwards traffic to next-hop 203.0.113.1?

    Answer: ip route 0.0.0.0 0.0.0.0 203.0.113.1

    A default static route uses the 0.0.0.0 0.0.0.0 network and mask to match all destinations not found in the routing table.

  4. What is the purpose of the OSPF dead interval?

    Answer: The time after which a neighbor is declared down if no Hello is received

    If a router does not receive a Hello from a neighbor within the dead interval, it declares that neighbor down and recalculates routes.

  5. Which command shows the routing protocol timers and networks configured on a Cisco router?

    Answer: show ip protocols

    The 'show ip protocols' command displays active routing protocols, their timers, networks, and administrative distance.

  6. In OSPF, two routers are connected on a point-to-point serial link. Which routers are elected as DR and BDR?

    Answer: No DR or BDR election occurs on point-to-point links

    DR/BDR elections only occur on broadcast and NBMA multi-access networks; point-to-point links do not use DR/BDR.

  7. A network administrator wants to summarize the routes 172.16.0.0/24, 172.16.1.0/24, 172.16.2.0/24, and 172.16.3.0/24 into a single advertisement. What is the correct summary route?

    Answer: 172.16.0.0/22

    These four /24 networks share the first 22 bits, so they can be summarized as 172.16.0.0/22.