350-601 Security Practice Question
Which TWO security features rely on the DHCP snooping binding table? (Select exactly 2)
⚠ Common exam trap
Cisco often tests the dependency of IP Source Guard and Dynamic ARP Inspection on the DHCP snooping binding table, and the trap here is that candidates confuse Port Security or MACsec as features that also rely on DHCP snooping, when in fact they operate independently.
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
✓
IP Source Guard
IP Source Guard (IPSG) uses the DHCP snooping binding table to validate the source IP address of packets received on untrusted ports. It drops any packet whose source IP does not match an entry in the binding table, preventing IP spoofing attacks. Dynamic ARP Inspection (DAI) also relies on the DHCP snooping binding table to validate ARP packets, ensuring that the sender MAC and IP addresses match a legitimate binding, thereby blocking ARP poisoning attacks.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Port Security
Why it's wrong here
Port Security uses MAC address tables, not DHCP snooping bindings.
- ✓
IP Source Guard
Why this is correct
IP Source Guard uses the DHCP snooping binding to permit only valid IP/MAC addresses.
- ✗
Private VLANs
Why it's wrong here
Private VLANs are a Layer 2 isolation technique, not dependent on DHCP snooping.
- ✓
Dynamic ARP Inspection
Why this is correct
DAI intercepts ARP packets and validates them against the DHCP snooping database.
- ✗
MACsec
Why it's wrong here
MACsec provides encryption and is independent of DHCP snooping.
Visual reference
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-601 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-601 exam.