As business grows and network expands, more and more users and devices as well as new applications like cloud-based services would join the network. It means that high network availability for sustainable business, more workplace Wi-Fi and up-to-date regulations for application usages are eagerly needed. Without an effective solution to control, optimize or block social and some other Web applications, businesses would risk not only losing productivity but also exposing company network to new threats. The ZyXEL USG Extreme Series are Next Generation Firewalls (NGFW) designed to deliver high availability, anti-malware protection and consolidated policy enforcement for medium-to large-sized businesses and campuses. The ZyXEL USGs provides WAN and VPN load balancing and failover ensures nonstop business communications, while incorporating bestin-breed anti-virus, anti-spam, content filtering and application intelligence technology for effective application optimization and comprehensive network protection.