防火墙 技术
用于维护网络免受恶意行为的损害，并阻止其非/法行为的网络设备或系统.作为一个安全网络的边界点.在不一样的网络区域之间进行流量的访问控制.(A network device or system used to maintain the network from malicious behavior and prevent its illegal/illegal behavior. As a boundary point of a secure network. Access control of traffic between different network areas.)
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