A basic introduction to network security appliances

Network security equipment includes IP protocol cipher machine, security router, line cipher machine, firewall, etc., and the broad sense of information security equipment includes cipher chips, encryption cards, identity cards, telephone cipher machines, fax cipher machines, asynchronous data cipher machines, security servers, security cipher suites, financial encryption machines/cards, security middleware, public key infrastructure (PKI) systems, authorization certificate (CA) systems, security operating systems, antivirus software, and network/system scanning systems , intrusion detection system, network security early warning and audit system, etc.