A.配置不當(dāng),防火墻會(huì)引起嚴(yán)重問題 B.很多應(yīng)用不能安全通過防火墻 C.用戶可能會(huì)積極尋找繞過防火期接收被阻信息的方法,使網(wǎng)絡(luò)遭受潛在攻擊的危險(xiǎn) D.未授權(quán)的流量可能經(jīng)隧道或隱藏在合法的流量中通過防火墻
A.SMTP B.Telnet C.FTP D.DNS
A.The command is accepted and the respective VLAN is added to vlan dat. B.The command is rejected. C.The command is accepted and you must configure the VLAN manually. D.The port turns amber.