Which configuration setting on a virtual switch prevents packet sniffing programs from analyzing network packets?

The configuration setting that prevents packet sniffing programs from analyzing network packets is when Promiscuous Mode is set to Reject.

In networking, promiscuous mode is a setting that allows a network interface to receive all packets on the network segment, regardless of the destination address. This is often utilized by packet sniffing programs to capture and analyze all traffic. By setting Promiscuous Mode to Reject, the virtual switch will not allow any virtual machine connected to that switch to capture packets that are not specifically addressed to them. This effectively disables the ability of packet sniffing software to monitor traffic flowing through the switch, enhancing network security and isolation between virtual machines.

This setting is particularly important in environments where sensitive data might be transferred, as it limits the visibility of network traffic to only those VMs that are intended to receive specific packets.