Even if your network is secure, you should still use a firewall. This an electronic barrier that blocks unauthorized access to your computers and devices, and is often included with comprehensive security software. Using a firewall ensures that all of the devices connected to your network are secured, including Internet of Things (IoT) devices like smart thermostats and webcams. This is important since many IoT devices aren’t equipped with security measures, giving hackers a vulnerable point of entry to your entire network.