A wireless network has lightweight APs distributed on multiple buildings and different AP groups. An administrator reported that AppleTV from one building is discovered in other buildings after it…

The correct answer is D. No ACL entry has been deployed to filter mDNS service advertisement between AP groups. In a wireless network using mDNS (Multicast DNS) for service discovery (like AppleTV), services are typically advertised over multicast. In a controller-based architecture with lightweight APs, mDNS snooping and AP groups help control the visibility and scope of service…

Wireless Security and Mobility

Question

A wireless network has lightweight APs distributed on multiple buildings and different AP groups. An administrator reported that AppleTV from one building is discovered in other buildings after it is queried. Why is this happening?

Options

AAppleTV service is discovered as a wired service provider.
BmDNS service is configured as a wireless service provider for user access.
CLightweight APs incorrectly filter mDNS service for each location.
DNo ACL entry has been deployed to filter mDNS service advertisement between AP groups.

How the community answered

(34 responses)

A
6% (2)
B
26% (9)
C
12% (4)
D
56% (19)

Explanation

In a wireless network using mDNS (Multicast DNS) for service discovery (like AppleTV), services are typically advertised over multicast. In a controller-based architecture with lightweight APs, mDNS snooping and AP groups help control the visibility and scope of service advertisements. If AppleTV in one building is being discovered in other buildings after a query, it means the mDNS advertisements are not being filtered or scoped correctly.

Topics

#mDNS#service advertisement#AP groups#ACL filtering

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