Practice Test Geeks(ICND1) Interconnecting Cisco Networking Devices Part 1 Practice Test
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Troubleshooting 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.

Read the first 7 Troubleshooting flashcards as text

  1. A host receives an APIPA address (169.254.x.x). What does this indicate about the network?

    Answer: The DHCP server is unreachable or not responding

    An APIPA address means the host failed to receive a DHCP lease and self-assigned an address in the 169.254.0.0/16 range.

  2. Which debug command would help identify why OSPF neighbor adjacencies are not forming?

    Answer: debug ip ospf adj

    'debug ip ospf adj' shows OSPF adjacency events and error messages that explain why neighbor relationships fail to establish.

  3. A switch trunk port shows only the native VLAN in 'show interface trunk' output. What is likely misconfigured?

    Answer: VLANs not added to the allowed list on the trunk

    If VLANs are not explicitly permitted on a trunk, they will not be carried across it, resulting in only the native VLAN being active.

  4. You suspect an access list is blocking traffic. Which command shows all configured ACLs and their match statistics?

    Answer: show access-lists

    'show access-lists' displays all configured access control lists along with match counters for each ACE.

  5. A router has two paths to the same destination, one via OSPF and one via RIP. Which path will be preferred and why?

    Answer: OSPF, because it has a lower administrative distance

    OSPF has an administrative distance of 110 versus RIP's 120, so the router will prefer the OSPF route.

  6. After replacing a switch, users report intermittent connectivity. 'Show spanning-tree' shows topology changes. What is likely happening?

    Answer: STP is reconverging due to the new switch

    Adding a new switch triggers STP reconvergence, causing temporary traffic interruptions as the topology stabilizes.

  7. A router's CPU utilization is at 99%. Which command helps identify the process consuming the most CPU?

    Answer: show processes cpu

    'show processes cpu' lists all IOS processes with their CPU utilization percentages, identifying the top consumer.