What protective systems does the JLTV offer against improvised explosive devices (IEDs)?

The JLTV is designed with advanced protective measures that specifically target threats posed by improvised explosive devices (IEDs). The inclusion of blast-resistant armor is key, as it is engineered to absorb and dissipate the energy from explosions, significantly reducing the risk of injury to occupants and damage to the vehicle.

Improved underbody protection is another critical element. This feature is designed to enhance survivability against blasts that occur beneath the vehicle, which are often a significant threat from IEDs. The combination of these protective systems allows the JLTV to perform in high-risk environments while providing maximum safety for its crew.

The other options do not provide the same level of protection against IEDs. Standard armor might offer some basic defense but lacks the specialized enhancements needed for effective blast resistance. Lightweight fabric shielding, while potentially useful in certain contexts, does not provide adequate protection against explosive threats. Unmanned defense systems focus on offensive capabilities rather than protective measures for the crew inside the vehicle, which is the primary concern when facing IED threats. Thus, the protective systems in the JLTV are specifically tailored to address the dangers posed by IEDs, making blast-resistant armor and improved underbody protection the correct answer.