网络管理员发现线上商城系统总是受到 SQL 注入、跨站脚本等攻击，公司计划购置（4）设备/系统，加强防范；该设备应部署在图 1 中设备①~④的（5）处。A．杀毒软件B．主机加固C．WAF（Web 应用防护系统）D．漏洞扫描
正确答案及解析
正确答案
解析
（4）C，（5）④
Web应用防护系统（Web Application Firewall，WAF）代表了新兴的信息安全技术，用以解决防火墙一类传统设备束手无策的Web应用安全问题。WAF工作在应用层，因此对Web应用防护具有明显的优势。
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