ICND1 Troubleshooting 4

Question 1

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

Accepted Answer

The DHCP server is unreachable or not responding

Answer

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.

Question 2

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

Accepted Answer

debug ip ospf adj

Answer

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

Question 3

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

Accepted Answer

VLANs not added to the allowed list on the trunk

Answer

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

Question 4

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

Accepted Answer

show access-lists

Answer

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

Question 5

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

Accepted Answer

OSPF, because it has a lower administrative distance

Answer

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

(ICND1) Interconnecting Cisco Networking Devices Part 1 Practice Test