3.1 Implement Multicast Components 300-430 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   What is the primary purpose of IGMP snooping on a wireless LAN controller (WLC)?

   • ATo forward multicast frames only to access points that have interested clients, reducing unnecessary wireless traffic.
   • BTo increase the multicast data rate to the highest supported rate for all clients.
   • CTo prevent multicast traffic from entering the wireless network entirely.
   • DTo convert all multicast frames to unicast frames before sending them to access points.
   Reveal Solution Discussion Select an answer first
2. 2application · medium

   A school district uses multicast for IPTV in classrooms. The WLC has IGMP snooping enabled, but the network administrator notices that multicast traffic is being sent to all APs, even those without clients that have joined the group. What is the most likely cause?

   • AThe multicast group address is in the link-local range.
   • BThe multicast router is not sending IGMP queries.
   • CThe APs are not configured to send IGMP reports to the WLC.
   • DIGMP snooping is not functioning because the WLC is not the IGMP querier.
   Reveal Solution Discussion Select an answer first
4. 3application · medium

   A company has a multicast source on a wired network and wireless clients on a different VLAN. The WLC is configured with IGMP snooping and is the IGMP querier for the wireless VLAN. The multicast router is on the wired VLAN. What must be configured on the WLC to ensure multicast traffic is forwarded from the wired network to the wireless clients?

   • AConfigure the WLC to use multicast-to-unicast conversion for the group.
   • BConfigure the WLC to use multicast direct and set the multicast group to the wireless VLAN.
   • CEnable multicast routing on the WLC and configure a multicast group-to-VLAN mapping.
   • DDisable IGMP snooping on the WLC and rely on the multicast router to forward traffic.
   Reveal Solution Discussion Select an answer first
5. 4application · medium

   A company uses multicast for live video conferencing. The application supports source-specific multicast (SSM) and requires that clients receive traffic only from a specific source. The WLC currently runs IGMPv2. What must be done to support this requirement?

   • AUpgrade the WLC and clients to IGMPv3.
   • BDisable IGMP snooping and rely on the multicast router to filter sources.
   • CUse multicast-to-unicast conversion to avoid the need for IGMPv3.
   • DConfigure the WLC to use IGMPv2 with source filtering.
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6. 5foundation · easy

   What is a primary challenge of delivering multicast traffic over Wi-Fi?

   • AMulticast frames cannot be encrypted, so they are sent in clear text.
   • BMulticast frames are typically sent at a low, fixed data rate to ensure all clients can receive them, consuming airtime.
   • CMulticast frames require the client to send an acknowledgment, which causes excessive overhead.
   • DMulticast frames are always dropped by access points because they lack a unicast destination MAC.
   Reveal Solution Discussion Select an answer first