Cisco最新CCNP642-901认证考题分析

1. which technology manages multicast traffic at layer 2 by configuring layer 2 lan interfaces dynamically to forward multicast traffic only to those interfaces that want to receive it?
a. igmp
b. igmp snooping
c. pim-dm
d. dvmrp
e. mospf
answer: b

2. which well-defined routing protocol would a network administrator configure on multicast routers when member routers are widely dispersed?
a. distance vector multicast routing protocol (dvmrp)
b. protocol independent multicast dense mode (pim-dm)
c. multicast open shortest path first (mospf)
d. protocol independent multicast sparse mode (pim-sm)
e. core-based trees (cbt)
answer: d

3. when building an ip multicast domain using pim which mode assumes that other routers do not want to forward multicast packets for the group?
a. pim-dm
b. pim-sm
c. pim-rp
d. cgmp
e. igmp snooping
answer: b

4. what is correct about the bgp synchronization command? (choose two.)
a. synchronization must be enabled when implementing a multi-homed bgp connection to multiple isps.
b. if it is turned on, a prefix learned from ibgp neighbor is valid only if a non-bgp (igp) route exists for that prefix.
c. synchronization is necessary when peering with an ebgp neighbor.
d. synchronization improves bgp routing convergence.
e. synchronization can be turned off if all the transit routers in an autonomous system running full mesh ibgp.
answer: be

5. all routers in the diagram are configured with eigrp. if rtb and rtc fail, which action will rta take with respect to the hq network?

a. rta will automatically route packets via rtd to the hq network.
b. rta will place the route via rtd into the hold down state.
c. rta will go into the active state for all routes.
d. rta will go into the active state for the route to hq network.
answer: d

6. which of the following nsap addresses is a private, locally administered address?
a. 39.0f01.0002.0000.0c00.1111.00
b. 48.0f01.0002.0000.0c00.1111.00
c. 49.0004.30ac.0000.3090.c7df.00
d. 52.0f01.0002.0000.0c00.1111.00
answer: c

7. router rta is configured as follows:
rta (config)#router rip
rta(config-router)#network 10.0.0.0
rta(config-router)#distribute-list 44 in interface bri0
rta(config-router)#exit
rta(config)#access-list 44 deny 172.16.1.0 0.0.0.255
rta(config)#access-list 44 permit any
what are the effects of this rip configuration on router rta? (choose two.)
a. no routing updates will be sent from router rta on interface bri0 to router rtx
b. router rta will not advertise the 10.0.0.0 network to router rtx
c. the route to network 172.16.1.0 will not be entered into the routing table on router rta
d. user traffic from the 172.16.1.0 network is denied by access-list 44
e. the routing table on router rta will be updated with the route to router rtw
answer: ce

8. a router is configured for redistribution to advertise eigrp routes into ospf on a boundary router. given the configuration:
router ospf 1
redistribute eigrp 1 metric 25 subnets
what is the function of the 25 parameter in the redistribute command?
a. it specifies the seed cost to be applied to the redistributed routes.
b. it specifies the administrative distance on the redistributed routes.
c. it specifies the metric limit of 25 subnets in each ospf route advertisement.
d. it specifies a new process-id to inject the eigrp routes into ospf.
answer: a

9. which two methods advertise internal networks to external isps via bgp? (choose two.)
a. using aggregate routes
b. disabling synchronization
c. forcing the next-hop address
d. defining routes via the network statement
answer: ad

10. place the bgp attributes in the correct order used for determining a route

• 计算机等级考试试题
• 软件水平考试
• 思科认证
• 微软认证
• ORACLE/CIW认证
• Linux认证

• · CCNA基础实验：配置帧中继网络
• · CCNA考试题库中英文翻译版
• · 思科认证CCNA（640-801）IOS命令大全
• · Cisco升级CCNA为640-802并推CENNT认证
• · 轻松掌握CCNP的学习方法
• · 温故知新：MST学习笔记
• · 2011思科新版CCNP认证体系全攻略
• · CCNA学习基础：DynamicACL的应用
• · CCNA试验考试命令总结
• · Cisco最新CCNP642-892考题分析

• · Cisco考试再认证常见31问题解答
• · 网络运维管理成企业信息化第一管家
• · 获得CCNA和CCNP认证的必备条件和有效期
• · 新版640-802的CCNA认证英文教材
• · 路由器网络分层解决方案
• · 如何识别真正的双线主机服务
• · Cisco认证实用技巧
• · 路由器应用技术——Cisco的MAC地址与IP绑
• · 巧妙利用路由器设置防范漏洞攻击
• · 思科Cisco认证最新真题50道：TCP/IP