What is firewall in car?

A firewall in a car is a security system that limits access to certain areas of the car's network. It works to protect the car from cyberattacks and unauthorized access from hackers by preventing external entities from accessing the car's electronic systems and network. Firewalls in cars function similarly to firewalls used in computer networks. They allow only legitimate traffic and block traffic that is deemed malicious or unauthorized. Many modern cars have multiple firewalls throughout the electronic systems, including the engine, infotainment system, and safety features. Firewalls in cars are essential as more and more features in cars are connected to the internet and, therefore, potentially vulnerable to cyber-attacks.