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?
A.
AppleTV service is discovered as a wired service provider.
B.
mDNS service is configured as a wireless service provider for user access.
C.
Lightweight APs incorrectly filter mDNS service for each location.
D.
No ACL entry has been deployed to filter mDNS service advertisement between AP groups.
The issue occurs because mDNS (multicast DNS) services, such as AppleTV discovery, are being advertised across the entire wireless network without proper filtering. Here's why:
mDNS Protocol:
mDNS allows devices to discover services (e.g., AppleTV, printers) on the local network using multicast traffic. By default, mDNS traffic is broadcast across the entire network, including all AP groups and buildings.
Lack of Filtering:
If no Access Control List (ACL) or filtering mechanism is in place to restrict mDNS traffic between AP groups or buildings, services like AppleTV will be discovered across the entire network, even in locations where they are not physically present.
Option A: AppleTV service is discovered as a wired service provider.
This is unrelated to the issue. The problem is not about whether AppleTV is wired or wireless but about the mDNS traffic being broadcast across the network.
Option B: mDNS service is configured as a wireless service provider for user access.
While mDNS is indeed a service used for discovery, the issue is not about its configuration but about the lack of filtering to restrict its advertisement.
Option C: Lightweight APs incorrectly filter mDNS service for each location.
Lightweight APs do not inherently filter mDNS traffic. Filtering must be configured at the controller or network level.
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rrahim
2 months, 2 weeks agorrahim
2 months, 2 weeks ago