* IGMP snooping is a feature that allows switches to monitor the IGMP (Internet Group Management Protocol) messages between hosts and multicast routers, and to learn which ports are interested in receiving which multicast groups.
* IGMP snooping can improve the network performance by reducing the unnecessary flooding of multicast traffic to all ports, and by forwarding it only to the ports that have requested it.
* IGMP snooping can also conserve bandwidth and CPU resources on the network devices and hosts, as they do not have to process unwanted multicast packets.
* IGMP snooping can be especially useful for streaming video applications, as they often use multicast to deliver the same content to multiple devices simultaneously.
* The other options are not relevant to addressing the issue of network performance degradation due to streaming video:
* Implementing another DHCP server would not help, as DHCP is used to assign IP addresses and other network parameters to hosts, but it does not affect the multicast traffic or the streaming video quality.
* Reconfiguring port tagging for the video traffic would not help, as port tagging is used to identify the VLAN membership of frames, but it does not control the multicast traffic or the streaming video quality.
* Changing the SSID of the APs would not help, as SSID is used to identify the wireless network name, but it does not affect the multicast traffic or the streaming video quality. References:
* CompTIA Network+ N10-008 Study Guide, Chapter 3: Network Protocols and Services, Section 3.2:
Configure and Support IPv4 and IPv6, p. 179-180
* Professor Messer's Network+ N10-008 Course Notes, Section 3.2: IPv4 and IPv6 Multicast, p. 37
* Professor Messer's Network+ N10-008 Video Training Course, 3.2 IPv4 and IPv6 Multicast