The enterprise network firewall market is primarily composed of purpose-built appliances for securing enterprise corporate networks. Products must be able to support single-enterprise firewall deployments and large and/or complex deployments, including branch offices, multitiered demilitarized zones (DMZs) and, increasingly, the option to include virtual versions for the data center. NGFWs (Next Generation Firewalls) have added new features to better enforce policy (application and user control) or detect new threats (intrusion prevention systems [IPSs], sandboxing and threat intelligence feeds). The NGFW continues to gradually replace stand-alone network IPS appliances at the enterprise edge. Although this is happening now, some enterprises will continue to choose to have best-of-breed next-generation IPSs (NGIPSs).
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