Difference between a Firewall, Router & Secure Web Gateway

Many of us, while discussing cybersecurity tools definition, get confused. When asked what the difference between a router, secure web gateway and a firewall or UTM is, we often tend to give vague, sometimes confusing answers. So this video http://bit.ly/2WTcjA2 will guide you an exact definition and difference between a firewall, router and secure web gateway.