An engineer must configure the firewall to monitor traffic within a single subnet without increasing the hop count of that traffic. How would the engineer achieve this?

Configuring Cisco Firepower as a transparent firewall allows it to operate at Layer 2, acting as a bridge between two network segments on the same subnet. This deployment method means the firewall intercepts and inspects traffic without introducing a new Layer 3 hop, thus not increasing the hop count for the monitored traffic.

Setting up Cisco Firepower as managed by Cisco FDM refers to the management interface, not the operational mode of the firewall that dictates how it handles network traffic and hop counts.

FXOS monitor only mode is related to chassis management and monitoring, not to configuring the data plane of the Firepower Threat Defense (FTD) for network traffic monitoring.

Intrusion prevention mode describes the security functionality (IPS), not the network deployment mode (routed or transparent) that determines how the device integrates into the network topology and its impact on hop count.