HPE Aruba Certified Network Security Expert (ACNSX) — Question 16

What is correct regarding multicasting and AOS-CX switches?

Answer options

• A. IGMP snooping is disabled, by default, on Layer-2 VLAN interfaces
• B. IGMP query functions are enabled, by default, on Layer-2 VLAN interfaces
• C. IGMP snooping is enabled, by default, on Layer-3 VLAN interfaces
• D. IGMP-enabled AOS-CX switches flood unknown multicast destinations

Correct answer: A

Explanation

The correct answer is A because IGMP snooping is indeed disabled by default on Layer-2 VLAN interfaces, which helps prevent unnecessary multicast traffic. Options B and C are incorrect as they misrepresent the default settings of IGMP functions on Layer-2 and Layer-3 VLANs, respectively. Option D is also wrong; AOS-CX switches will not flood unknown multicast destinations if IGMP is enabled.