On which layer does IP source guard provide filtering?

Related questions

1. How do I disable IGMP snooping?
2. What is snooping mode?
3. What is poisoning attack on a network?
4. What is IGMP snooping and why would I need it?
5. What is the result of a passive ARP poisoning attack?
6. What is IP source?
7. How does ARP poisoning take advantage of the use of ARP?
8. Is DNS required for DHCP?
9. What is dynamic ARP inspection?
10. What is Option 82 in DHCP snooping?

Tags

1. #feature
2. #match
3. #addresses
4. #dynamic
5. #untrusted
6. #layer
7. #ports
8. #legitimate
9. #malicious
10. #impersonating
11. #hosts
12. #snooping
13. #filtering
14. #address
15. #assuming
16. #access
17. #source
18. #binding
19. #static
20. #guard
21. #prevent
22. #provides