How many DHCP Troubleshooting Scenarios questions are on this page?

This page has 5 DHCP Troubleshooting Scenarios scenario questions for the SISE exam, each with detailed explanations and wrong-answer analysis.

How should I approach SISE scenario questions?

Read the full scenario before looking at the answer options. Identify the constraint or requirement in the scenario, then eliminate options that are generally true but wrong for this specific case. Scenario questions reward careful reading over pattern matching.

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Scenario-based practice

DHCP Troubleshooting Scenarios

Practise SISE DHCP questions covering DORA flow, scopes, excluded addresses, default gateway options, helper addresses, and troubleshooting clients that receive APIPA or cannot get an IP address.

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Scenario guide

How to approach dhcp troubleshooting scenarios

DHCP questions cover server configuration, relay agents (ip helper-address), DHCP snooping, and the four-step DORA handshake. Common exam scenarios: a host isn't getting an IP, a relay agent isn't forwarding requests, or a rogue DHCP server is handing out wrong addresses.

Quick answer

DHCP questions usually test address assignment, scopes, relay agents, excluded addresses and why a client cannot obtain an IP address.

DHCP discovery, offer, request and acknowledgement flow.

DHCP scopes, excluded addresses and default gateway options.

DHCP relay using helper addresses.

Troubleshooting clients that receive APIPA or no address.

Practice scenarios

Question 1mediummultiple choice

Read the full DHCP explanation →

You are configuring a DHCP probe on a Cisco ISE node to identify endpoints. Which specific configuration step is required to ensure the ISE node receives DHCP traffic when the client and server are on a different subnet?

A
Configure a DHCP relay agent on the ISE node itself.
Why wrong: ISE does not act as a DHCP relay agent.
B
Enable DHCP Server mode on the Cisco ISE Profiling service.
Why wrong: ISE is not a DHCP server in this context.
C
Configure an IP helper-address on the Layer 3 device for the client VLAN pointing to the ISE node.
IP helper-address is required to forward DHCP requests to the ISE node.
D
Enable DHCP Snooping on the ISE node interface.
Why wrong: DHCP Snooping is a switch feature, not an ISE probe setting.

Full breakdown with real-world context →

Question 2mediummulti select

Read the full DHCP explanation →

Which TWO of the following are potential sources of information for the DHCP probe?

A
Layer 2 source MAC address.
Why wrong: MAC address is an attribute of the frame, not the DHCP option.
B
IP Header Source Address.
Why wrong: Not specific to DHCP probe attributes.
C
DHCP Option 12 (Host Name)
Why wrong: While present, these two are the standard for profiling.
D
DHCP Option 60 (Vendor Class Identifier)
Option 60 is a primary source of device identification.
E
DHCP Option 55 (Parameter Request List)
Option 55 helps identify the OS/client type.

Full breakdown with real-world context →

Question 3hardmulti select

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Which TWO of the following are necessary to correctly configure a custom profiling condition based on DHCP attributes?

A
Enable HTTP profiling.
Why wrong: HTTP is a separate probe.
B
Configure a static IP on the endpoint.
Why wrong: Static IP is not a DHCP condition requirement.
C
Define a matching operator (e.g., equals, contains).
The operator defines the logic of the match.
D
Clear the MAC address table on the switch.
Why wrong: This is unrelated to the condition logic.
E
Select the correct DHCP attribute from the attribute list.
You must map the logic to a specific attribute.

Full breakdown with real-world context →

Question 4hardmultiple choice

Read the full DHCP explanation →

You want to improve profiling accuracy for endpoints that do not send DHCP options. You decide to use SNMP Trap profiling. What is a critical prerequisite for this to function?

A
The network device must be configured to send SNMP traps to the ISE PSN IP address.
Without the destination set on the switch, the ISE node will never receive the traps.
B
The endpoint must support SNMP agents.
Why wrong: The switch sends the trap based on link status, not the endpoint.
C
The ISE node must have the SNMP Query probe enabled.
Why wrong: SNMP Query and Traps are distinct probe mechanisms.
D
RADIUS Accounting must be disabled.
Why wrong: RADIUS Accounting is unrelated to SNMP Trap processing.

Full breakdown with real-world context →

Question 5hardmultiple choice

Read the full DHCP explanation →

You are troubleshooting a device that is stuck in the 'Unknown' profile state. You have confirmed that the DHCP probe is receiving packets. What is the next logical step to investigate the failure?

A
Increase the SNMP polling interval.
Why wrong: SNMP is a separate probe; if DHCP is working, you should focus on that logic.
B
Check the attributes of the endpoint in Context Visibility.
This confirms if the DHCP data is being parsed into attributes recognized by the Profiling Policy.
C
Delete the endpoint from the database.
Why wrong: This is a workaround that doesn't fix the underlying policy mismatch.
D
Restart the ISE node services.
Why wrong: A drastic step that is rarely the correct first move for a profiling logic issue.

Full breakdown with real-world context →

These SISE practice questions are part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style SISE questions with detailed explanations, topic-based practice, mock exams, readiness tracking, and study analytics.

DHCP Troubleshooting Scenarios

How to approach dhcp troubleshooting scenarios

Quick answer

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SISE troubleshooting practice questions

Practice scenarios

You are configuring a DHCP probe on a Cisco ISE node to identify endpoints. Which specific configuration step is required to ensure the ISE node receives DHCP traffic when the client and server are on a different subnet?

Which TWO of the following are potential sources of information for the DHCP probe?

Which TWO of the following are necessary to correctly configure a custom profiling condition based on DHCP attributes?

You want to improve profiling accuracy for endpoints that do not send DHCP options. You decide to use SNMP Trap profiling. What is a critical prerequisite for this to function?

You are troubleshooting a device that is stuck in the 'Unknown' profile state. You have confirmed that the DHCP probe is receiving packets. What is the next logical step to investigate the failure?