You work as a Network Administrator in a company. The NIDS is implemented on the network. You want to monitor network traffic. Which of the following modes will you configure on the network…

Full duplex is a transmission mode describing simultaneous bidirectional communication on a link and does not affect whether the NIC captures frames addressed to other hosts.

Audit mode is not a recognized or standard NIC operating mode and has no defined technical meaning in the context of network interface card configuration.

Half duplex describes one-directional-at-a-time communication and is a link characteristic, not a packet capture mode, so it does not enable monitoring of all network traffic.

In promiscuous mode, the network interface card passes every received frame to the operating system rather than discarding frames not addressed to its own MAC, enabling the NIDS to inspect all packets traversing the network segment. Without this mode, the NIC silently drops non-addressed traffic, making monitoring incomplete and ineffective for intrusion detection. Promiscuous mode is the standard and necessary NIC configuration for any passive network monitoring or NIDS deployment.