摘要:华为HCIP-Datacom题库哪里找?华为HCIP-Datacom认证哪里找题库?本文为考生带来华为HCIP-Datacom题库带解析的内容。华为HCIP-CT(821)试题练习十二见正文。
以下是华为HCIP-Datacom题库:HCIP-CT(821)试题练习十二的内容,更多试题可在本文文首本文资料处或文末的资料下载栏目下载查看。
31、当OSPF运行在广播网络中时需要选举DR和BDR,那么在下列哪种状态下会进行DR和BDR的选举?
A、2way状态
B、Exchange 状态
C、Full状态
D、Init状态
试题答案:A
试题解析:<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">OSPF<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">路由器在完全邻接之前<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">,<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">所经过的几个状态:
<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"=""><spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"=""><spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"=""><spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">
<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">1. Down- Attempt- Init- 2way- ExStart- Exchange- Loading- Full<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">等状态<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">。<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">
<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">其中<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">?Init<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">状态:<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">还未收到邻居发送给本设备hello报文<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">,<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">2-Way<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">通信还没有建立起来的状态。<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">
<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">2way<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">状态:双向会话建立,而<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">route id<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">彼此出现在对方的邻居列表中。<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">(<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">若为广播网络:例如:以太网。在这个时候应该选<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">DR<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">,<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">BDR<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">。<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">)<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">
<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">Exchange<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">状态:信息交换状态<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">,<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">本地路由器和邻居交换一个或多个<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">DBD<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">分组<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">(<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">也叫<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">DDP) <spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">。<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">DBD<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">包含有关<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">LSDB<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">中<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">LSA<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">条目的摘要信息。<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">
<spanyes';font-family:'times new="" roman';mso-fareast-font-family:宋体;="" font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">Full<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">状态:完全邻接状态,<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">此时<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">邻居的<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">lsdb完全同步<spanyes';font-family:宋体;mso-ascii-font-family:'times new="" roman';="" mso-hansi-font-family:'times="" roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"="">。
32、缺省情况下,广播型网络中运行IS-IS的路由器,DIS发送CSNP报文的周期为多少秒?
A、10
B、3.3
C、30
D、40
试题答案:A
试题解析:CSNP报文用来描述LSDB,类似于OSPF的DD报文;DIS发送CSNP报文的周期10秒。
33、交换机控制平面的功能不包括哪个?
A、业务处理
B、路由运算
C、系统加载
D、流量统计
试题答案:C
试题解析:交换机控制平面的功能不包括系统加载。
34、关于OSPF的AS-External-LSA中LSA头部信息描述错误的是?
A、Link State ID 表示目的网络地址
B、Forwarding Address 永远为0.0.0.0
C、Advertising Router 表示ASBR的Router-ID
D、Net mask 表示目的网段的网络掩码
试题答案:B
试题解析:Forwarding Address 表示次优路径在同时满足如下条件时,ASBR会在ASE的FA域内填写转发地址,这时FA就不是0.0.0.0
OSPF在ASBR与外部网络连接的下一跳接口启动;
ASBR与外部网络连接的下一跳接口没有被设置为被动接口;
ASBR与外部网络连接的下一跳接口不是OSPF 点到点或P2MP类型的;
ASBR与外部网络连接的下一跳接口地址是落在OSPF协议中发布的网络范围之内。
35、下面关于OSPF缺省路由描述错误的是?
A、OSPF路由可以由区域边界路由器(ABR)发布,Type3缺省,Summary LSA ,用来指导区域内路由器进行区域之间报文的转发
B、自治系统边界路由器(ASBR)发布Type5外部缺省ASELSA ,或者Type7外部缺省NSSALSA ,用来指导自治系统(AS)内路由器访问自治系统外部
C、当路由器无精确匹配的路由时就可以通过缺省路由进行报文转发
D、由于OSFP路由的分级管理,Type5/7缺省路由的优先级高于Type3路由
试题答案:D
试题解析:LSA优先顺序是type1> type2> type3> type4> type5> type6>type7。
36、下面关于OSPF中的ABR描述错误的是?
A、ABR不产生三类、四类、五类LSA
B、ABR将连接的非骨干区域内的一类、二类LSA转换成三类LSA发布到骨干区域中
C、ABR将骨干区城内的一类、二类LSA、三类LSA转换成三类LSA发布到连接的非骨干区域中
D、ABR上有多个LSDB,ABR为每一个区域维护一个LSDB
试题答案:A
试题解析:ABR如果在MA网络中ABR又被选为DR的话是可以产生一、二、三、四类的LSA,五类的LSA由ASBR产生。
37、以下关于OSPF协议报文说法错误的是?
A、OSPF所有报文的头部格式相同
B、OSPF所有报文头部都携带了Router-D字段
C、OSPF协议使用五种报文完成路由信息的传递
D、OSPF报文采用UDP报文封装并且端口号是89
试题答案:D
试题解析:OSPF协议基于IP运行,协议的数据报文直接采用IP封装,IP报文头部对应的协议号为89。
38、在IS-IS的广播网络中,Level-1路由器使用哪个组播MAC地址作为发送IIH的目的地址?
A、0180-c200-0000
B、0180-c200-0015
C、0100-5e00-0001
D、0180-c200-0014
试题答案:D
试题解析:Level-1 IS-IS使用Level-1 LAN IIH(Level-1 LAN IS-IS Hello),目的组播MAC为:0180-c200-0014。Level-2 IS-IS使用Level-2 LAN IIH(Level-2 LAN IS-IS Hello),目的组播MAC为:0180-c200-0015。
39、关于BGP的Keepalive 报文消息的描述错误的是?
A、Keepalive 报文只包含个BGP数据报头
B、缺省情况下Keepalive 的时间间隔是18
C、Keepalive 报文主要用于对等路由器间的运行状态和链路的可用性确认
D、Keepalive 周期性的在两个BGP邻居之间发送
试题答案:B
试题解析:缺省情况下,发送KeepAlive 的时间间隔为60 秒,Hold Time是180秒
40、在BGP配置中使用认证应该如何配置?
A、一对BGP对等体之间必须使用相同的MD5 password
B、AS内的所有路由器必须使用相同的password
C、一台路由器上的所有BGP对等体都必须使用相同的password
D、同一个AS内的所有路由器都必须使用相同的password
试题答案:A
试题解析:BGP配置认证是只要求对等体之间必须使用相同的MD5 password,而不同对等体与AS之间是可以配置不同password的。
华为认证备考资料免费领取
去领取
专注在线职业教育25年