ZyXEL USG Extreme Series are Next Generation Firewalls (NGFW) designed to deliver high availability, anti-malware protection and consolidated policy enforcement for medium- and large-sized businesses and campuses. The ZyXEL USGs provide WAN and VPN load balancing and failover ensures nonstop business communications, while incorporating best-in-breed anti-virus, anti-spam, content filtering and application intelligence technology for effective application optimization and comprehensive network protection.