mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: An engineer applies the following configuration…
An engineer applies the following configuration to an interface:
interface GigabitEthernet0/5
ipv6 dhcp guard attach-policy DHCP_GUARD ipv6 snooping database file nvram:ipv6-snoop.db
Which statement is true?
⚠ Common exam trap
Cisco often tests the independence of First Hop Security features; the trap here is assuming that the snooping database must be present or populated for DHCP Guard to function, when in fact DHCP Guard operates based on the policy configuration alone.
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
✓
The DHCP guard policy is applied to the interface, and the snooping database is stored in NVRAM.
The 'ipv6 dhcp guard attach-policy DHCP_GUARD' command applies the DHCP Guard policy to the interface, and the 'ipv6 snooping database file nvram:ipv6-snoop.db' command configures the snooping database to be stored in NVRAM. These two commands operate independently; the DHCP Guard policy is enforced immediately upon attachment, regardless of the database's presence or population state.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The DHCP guard policy is applied to the interface, and the snooping database is stored in NVRAM.
Why this is correct
Both commands are independent; the guard policy filters DHCP, and the database stores bindings.
- ✗
The DHCP guard policy is applied only if the snooping database is present.
Why it's wrong here
The guard policy works independently of the database file.
- ✗
The interface will not forward any DHCP messages until the database is populated.
Why it's wrong here
The guard policy operates regardless of the database.
- ✗
The snooping database is used to validate DHCP server messages.
Why it's wrong here
The database stores bindings, but validation is done by the guard policy.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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