Secure Upgrade Plus for SonicWALL Upgrades or Competitive Replacements. Includes 2 or 3-year Comprehensive Gateway Security Suite Subscription. The SonicWALL Secure Upgrade Program offers aggressive discounts on purchases of registered SonicWALL products. All SonicWALL Secure Upgrade solutions offer RFDPI firewall and VPN technologies with integrated gateway anti-virus, anti-spyware, and intrusion prevention, enforced desktop anti-virus, content filtering and secure wireless capabilities. NSA and E-Class NSA solutions also offer the ultra-high-performance advantage of multi-core processor platforms. Unlike stateful packet inspection solutions, SonicWALL"s RFDPI solution handles unlimited file sizes and virtually hundreds of thousands of concurrent downloads, providing ultimate scalability and performance for growing networks.