Dell SonicWALL NSA 220 Series high-performance Next-Generation Firewalls offer branch offices and distributed enterprises in-depth frontline security, application and user control, network productivity and optional 802.11 dual-band wireless. The NSA 220 acts as the first line of network defense against viruses, Trojans, key-loggers and other application layer attacks, without compromising network performance. By consolidating many functions, including the security of networking, remote access and wireless, the solution simplifies management.