A.access-list 50 deny 192.168.1.1 0.0.0.255 B.access-list 110 deny ip any any C.access-list 2500 deny tcp any host 192.168.1.1 eq 22 D.access-list 101 deny tcp any host 192.168.1.1
A.身份认证 B.错误检测 C.多连接 D.同步并行
A.接口0 B.接口1 C.R2 D.R3
A.包过滤防火墙B.木马防火墙C.应用代理防火墙D.状态检测防火墙
A.10s B.20s C.30s D.40s
A.安全性和可扩展性 B.稳定性与可靠性 C.可兼容性与连通性 D.开发性和可管理性
A.Winmail B.URL C.SMTP D.DNS