The Database team will deploy a new clustering technology that uses IPv4, multicast-based data replication, where the servers listen and transmit at the same time on multiple groups. Multicast is not

IGMP snooping allows the switch to inspect IGMP membership reports and queries to build a forwarding table mapping multicast groups to specific ports, ensuring multicast frames are sent only to ports with interested receivers rather than flooding all ports.

PIM snooping is used to optimize multicast traffic in environments where PIM-enabled routers are present on the segment; since no IP multicast routing is being deployed on this network, PIM snooping does not apply.

MLD snooping is the IPv6 equivalent of IGMP snooping and manages IPv6 multicast group membership; the question specifies IPv4 multicast, so MLD snooping is not relevant here.

An IGMP querier is needed because with no multicast router present on the segment there is no device to send periodic IGMP General Queries; the switch acting as IGMP querier sends these queries so hosts can report active group memberships and the snooping table remains accurate.

Bidirectional PIM is a Layer 3 multicast routing protocol feature used to optimize many-to-many multicast flows on routed networks and is not a Layer 2 switch feature applicable when no multicast routing is deployed.