easyMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show ip dhcp relay information trusted Interface Trusted
GigabitEthernet0/1 Yes GigabitEthernet0/2 No
Based on this output, which statement is correct?
⚠ Common exam trap
Cisco often tests the misconception that 'trusted' means the interface is trusted to send DHCP requests, when in fact it means the interface is trusted to receive and forward packets that already contain option 82 information.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
DHCP relay information is trusted on GigabitEthernet0/1, so option 82 packets are accepted on that interface.
The command 'show ip dhcp relay information trusted' displays the trust status of each interface for DHCP relay information (option 82). When an interface is marked as 'Yes' under the Trusted column, it means the router will accept and forward DHCP packets that already contain option 82 information from that interface. Therefore, on GigabitEthernet0/1, option 82 packets are accepted.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
DHCP relay information is trusted on GigabitEthernet0/1, so option 82 packets are accepted on that interface.
Why this is correct
Trusted interfaces accept option 82.
- ✗
DHCP relay information is trusted on both interfaces.
Why it's wrong here
GigabitEthernet0/2 is not trusted.
- ✗
DHCP relay information is not configured on any interface.
Why it's wrong here
The output shows trust settings.
- ✗
DHCP relay information is trusted on GigabitEthernet0/2, so option 82 packets are dropped.
Why it's wrong here
Untrusted interfaces drop option 82.
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Senior Network & Security Engineer · founder of Courseiva
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