The Dell Sonic WALL Network Security Appliance (NSA) 220 & NSA 220 Wireless-N Series high-performance Next-Generation Firewalls offer branch offices & distributed enterprises in-depth front line security, application & user control, network productivity & optional 802.11 dual-band wireless. The NSA 220 Series firewalls act as the first line of network defense against viruses, Trojans, key-loggers & other application layer attacks, without compromising network performance. Management is simplified by consolidating many functions, including network security, remote access & wireless. The NSA 220 Series offers an extensive array of advanced networking & configuration flexibility features in an accessible, affordable platform that is easy to deploy & manage in a wide variety of environments.