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H3C Large-Scale Routing Network Technologies V2.0 Sample Questions:

1. 在如图所示的拓扑中, RTA 和 RTB 、 RTB 和 RTC 之间已经网络层可达。
RTA 、 RTB 和 RTC 上分别执行如下配置:
RTA]ospf 1
RTA-ospf-1]area 1
RTA-ospf-1-area-0.0.0.1]network 192.168.1.0 0.0.0.255
RTA-ospf-1-area-0.0.0.1]network 1.1.1.1 0.0.0.0
RTB]ospf 1
RTB-ospf-1]area 1
RTB-ospf-1-area-0.0.0.1]network 192.168.1.0 0.0.0.255
RTB-ospf-1-area-0.0.0.1]area 0
RTB-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0
RTB-ospf-1-area-0.0.0.0]network 192.168.2.0 0.0.0.255
RTC]ospf 1
RTC-ospf-1]area 0
RTC-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0
RTC-ospf-1-area-0.0.0.0]network 192.168.2.0 0.0.0.255
RTC-ospf-1]silent-interface all
以下说法正确的是 ________

A) RTA 和 RTB 之间可以正常建立邻居
B) RTC 可以接受 RTB 发送的 Hello 报文
C) RTC 不向 RTB 发送 Hello 报文
D) RTB 和 RTC 之间无法建立邻居

2. 如图, RTA 、 RTB 、 RTC 运行 OSPF ,进程号为 100 ； RTA 、 RTB 、 RTD 间运行 OSPF 进程 200 。所有互联链路的 cost 都设置为 10 。在 RTA 和 RTB 上设置 OSPF 100 的外部路由优先级为 190 ,在 RTC 上将一条外部路由 172.16.1.0/24 引入 OSPF100 。 RTA 设置将 OSPF100 的路由引入到 OSPF200 , RTB 上设置将 OSPF200 的路由重新引入到 OSPF100 。运行稳定后假设 RTC 上引入外部路由 172.16.1.0/24 突然消失。
根据以上场景分析,下面描述不正确的是 ______ 。

A) RTC 上 172.16.1.0/24 的路由消失
B) RTC 上 172.16.1.0/24 的路由仍旧存在,下一跳指向 RTB
C) RTD 上 172.16.1.0/24 的路由消失
D) RTD 上 172.16.1.0/24 的路由仍旧存在,下一跳指向 RTA

3. 在如图所示的拓扑中, RTA 、 RTB 上分别执行如下配置:
RTA]ospf 1
RTA-ospf-1]area 1
RTA-ospf-1-area-0.0.0.1]network 1.1.1.1 0.0.0.0
RTA-ospf-1-area-0.0.0.1]network 10.0.0.0 0.0.0.255
RTA-ospf-1-area-0.0.0.1]network 192.168.1.0 0.0.0.255
RTA-ospf-1-area-0.0.0.1]network 192.168.4.0 0.0.0.255
RTA-ospf-1-area-0.0.0.1]network 192.168.7.0 0.0.0.127
RTA-ospf-1-area-0.0.0.1]network 192.168.8.0 0.0.0.127
RTA-ospf-1-area-0.0.0.1]network 192.168.15.0 0.0.0.255
RTB]ospf 1
RTB-ospf-1]area 1
RTB-ospf-1-area-0.0.0.1]network 10.0.0.0 0.0.0.255
RTB-ospf-1-area-0.0.0.1]area 0
RTB-ospf-1-area-0.0.0.1]abr-summar192.168.0.0 255.255.248.0 not-advertise
则 RTC 的路由表中不可能存在以下哪些路由 _____

A) 192.168.7.0/25
B) 192.168.1.0/24
C) 192.168.0.0/22
D) 192.168.8.0/24

4. 在某路由器上运行 displaipv6 interface vlan-interface1 verbose 命令显示信息如下:
Vlan-interface1 current state:UP
Line protocol current state:UP
IPv6 is enabled, link-local address is FE80::2010:1
No global unicast address configured
Joined group address(es):
FF02::1:FF10:1
FF02::2
FF02::1
MTU is 1500 btes
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds
ND retransmit interval is 1000 milliseconds
ND advertised reachable time is 0 milliseconds
ND advertised retransmit interval is 0 milliseconds
ND router advertisements are sent ever600 seconds
ND router advertisements live for 1800 seconds
Hosts use stateless autoconfig for addresses
从上述信息可以得知 ______________ 。

A) Vlan1 接口无聊和 IPv6 协议状态都是 Up 的
B) Vlan1 接口没有启用 ND RA 的发送功能
C) 该接口监听的组播地址包括 FF02::1 、 FF02::2 、 FF02::1:FF10:1
D) Vlan1 接口 IPv6 单播地址只有 FE80::2010:1 ,没有配置全局单播地址

5. 如图所示的三个自治系统中, AS200 为 AS100 和 AS300 的过滤 AS ,其中 AS100 内部生成路由
10.1.1.0/24 , 10.1.2.0/24 , 10.1.3.0/24 。
主要设备配置如下所示。
RTC :
bgp 100
aggregate 10.1.0.0 255.255.0.0
network 10.1.1.0 255.255.255.0
network 10.1.2.0 255.255.255.0
network 10.1.3.0 255.255.255.0
undo snchronization
peer 200.1.2.2 as-number 200
RTB :
bgp 200
aggregate 10.1.0.0 255.255.0.0 as-set detail-suppressed
undo snchronization
peer 200.1.2.1 as-number 100
peer 200.1.3.2 as-number 300
则关于各设备上的路由学习情况,以下说法正确的是 _______ 。

A) RTA1 上只能学习到 0.1.0.0/16 的聚合路由。
B) 在 RTB 上, BGP 路由表中有聚合路由 10.1.0.0/16 ,也有 10.1.1.0/24 、 10.1.2.0/24 、 10.1.3.0/24 等明细路由。
C) 在 RTA 上, 10.1.0.0/16 路由的 AS-PATH 属性为 200 、 100 ,该路由的 AGGRAGATOR ID 为 RTC 的地址。
D) 在 RTA 上, 10.1.0.0/16 路由的 AS-PATH 属性为 200 ,该路由的 AGGRAGATOR ID 为 RTB 的地址。

Solutions: