Huawei H12-731 中文 : HCIE-Security (Huawei Certified Internetwork Expert-Security) (H12-731中文版)

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Huawei HCIE-Security (Huawei Certified Internetwork Expert-Security) (H12-731中文版) Sample Questions:

1. 用户无法通过 SSH 登录管理设备,现获取到如下配置信息,请分析可能产生的原因是:
aaa
manager-user sshuser
password cipher Admin@123
service-type ssh
ssh authentication-type password
ssh service-type stelnet
authentication-scheme admin_local
#
user-interface vty o 4
authentication-mode aaa
protocol inbound ssh
#
return

A) 未对 sshuser 用户配置 level 3
B) 管理员未在系统视图下配置 stelnet server enable 命令
C) 若登录接口非设备管理口,需要在接口下执行 service-manager ssh permit
D) 未配置 aaa 的 domain 及指定其认证方式为 local

2. 相比 802.1X 认证, PortaI 认证的优点有哪些 ?

A) Portal 认证不要求安装客户端软件。
B) Portal 能够用于哑终端接入场景。
C) Portal 认证更适合网络的临时访问者。
D) Portal 认证兼容 MAC 认证。

3. 下列属于应用层攻击的是:

A) Teardrop 攻击
B) CC 攻击
C) 缓冲区溢出
D) Smurf 攻击

4. ARP 协议用于将 IP 地址映射到正确的 MAC. 地址,这样设备就可以给数据帧封装上正确的帧头,从而完成数据的转发。
如果 ARP 表出现异常会直接导致设备无法转发报文,针对双机热备场景下,主备防火墙对 ARP 进行应答了下面的描述中哪些是正确的 ?

A) 请求接口实 IP 地址,以接口实 MAC 应答。
B) 配置了 ARP 代理同时请求 ARP 的源 IP 和目的 IP 在同一网段。
C) 请求 NAT 地址池 IP 地址,当前主设备以虚 MAC 应答,备设备不应答。
D) 请求 VRRP 虚 IP 地址,当前主设备以虚 MAC 应答,备设备不应答。

5. 关于 MTU 和 PMTU 说法正确的是 ?

A) 探测 PMTU 是通过探测获取指定目的 IPv4 地址的 PMTU 值,然后使用 MTU 值来发送报文。
B) MTU （ Maximum Transfer Unit )指的是在网络中能够传输的最大数据报文的大小,以字节为单位。
C) 在 IP 网络中,从源地址到目的地址可能会经过具有不同 MTU 值的接口,其中最大的 MTU 值即为该路径的 PMTU 。
D) 设备会在入接口检查 MTU ,如果数据包大小超过 MTU 值,将被丢弃。

Solutions: