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