While SonicWALL is now a part of Dell, this network security and content control business sells a wide range of Internet appliances that can help businesses stay secure without compromising the performance of their network. These highly effective firewalls scale easily, and allow you a high level of support without causing unnecessary server slowdown or heavy loads. The sophisticated firewall solution allows small- and medium-sized businesses to receive enterprise-level threat management support without the price tag normally associated with that level of protection.