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

1. 在如图的 TCP 断开连接 4 次握手中, ① 和 ② 应分别是:

A) a+1 和 b
B) a 和 b+1
C) a+1 和 b+1
D) a 和 b

2. USGA G0/0/2 (30.1.1.2) --------------------------- (30.1.1.1) G0/0/2 USGB
某网络采用如上拓扑,并 USGA 和 USGB 建立 BFD ,但是发现 BFD 会话无法 Up ,下面最有可能的原因是 ?
<USGA> display bfd session all
---------------------------------------------------------------------------------------------------------------
Local Remote Peer IP Address Interface Name State Type
----------------------------------------------------------------------------------------------------------------
60 20 30.1.1.1 GigabitEthernet0/0/2 Down Static
----------------------------------------------------------------------------------------------------------------
<USGB> display bfd session all
---------------------------------------------------------------------------------------------------------------
Local Remote Peer IP Address Interface Name State Type
----------------------------------------------------------------------------------------------------------------
60 20 30.1.1.2 GigabitEthernet0/0/2 Down Static
----------------------------------------------------------------------------------------------------------------

A) BFC 会话配置没有提交
B) 未绑定出接口的 BFD 会话
C) BFC 会话两端的标识符不对应
D) BFC 会话一端配置了 shutdown 命令

3. IKEv1 和 IKEv2 的区别,下面哪些描述是正确的 ?

A) IKE SA 的完整性算法仅 IKEv1 支持。
B) IKEv2 可以借助 AAA 服务器分配私网 IP 地址, IKEv1 无法提供此功能。
C) IKEv1 默认支持 DPD ,只要在一端配置 DPD ,另一端就可以响应 DPD 报文。 IKEv2 不可以。
D) 建立 IKE SA 和 IPsec SA , IKEv2 使用 4 条消息, IKEV1 主模式使用 9 条消息。

4. 关于 802.1X 的认证模式,以下描述正确的有 ?

A) 802.1X 认证模式分为基于接口和基于 MAC 两种。
B) 从对所有接入用户认证的要求来看,基于 MAC 模式比基于端口模式更安全。
C) 从对所有接入用户认证的要求来看,基于端口模式比基于 MAC 模式更安全。
D) 在同一个接口下,基于端口和基于 MAC 两种模式可以同时开启。

5. 企业现网一台 FTP 服务器（ DMZ )向外部（ Untrust )提供 FTP 服务,外网口部署了 USG 防火墙。
在 FTP 服务器上抓包获取到如下信息:
序号 源地址 目的地址 协议 报文摘要
1 1.1.1.1 192.168.1.2 TCP 3318>21 [SYN] Seq=0 Len=0 MSS=1460
2 192.168.1.2 1.1.1.1 TCP 21>3318 [SYN, ACK] Seq=0 Ack=1 Win=65535 Len=0 MSS=1460
3 1.1.1.1 192.168.1.2 TCP 3318>21[SYN] Seq=1 Ack=1 Win=65535 Len=0
......
13 1.1.1.1 192.168.1.2 FTP Request: PASV
14 192.168.1.2 1.1.1.1 FTP Response: 227 Entering Passive Mode (192, 168, 1, 2, 4, 162)
15 1.1.1.1 192.168.1.2 TCP 3319>1186 [SYN] Seq=0 Len=0 MSS=1460
16 192.168.1.2 1.1.1.1 TCP 1186>3319 [SYN, ACK] Seq=0 Ack=1 Win=65535 Len=0 MSS=1460
17 1.1.1.1 192.168.1.2 TCP 3319>1186 [SYN] Seq=1 Ack=1 Win=65535 Len=0
.....
以下描述正确的是:

A) 主机 1.1.1.1 与 FFP 服务器 192.168.1.2 之间已经正常建立数据通道。
B) 防火墙上会自动生成 servermap 表项。
C) 防火墙上须完成 nat-policy 的 NAT 正确配置。
D) FTP 服务器 FTP 服务为主动模式。

Solutions: