46. Refer to the exhibit. In this network, R1 is configured not to perform autosummarization within EIGRP. What routes will R3 learn from R2 through EIGRP?
如图所示，在这个网络中 R1配置为在EIGRP中不做自动汇总，那么R3能从R2学到什么 EIGRP的路由信息。
A. 172.30.1.0/24 and 10.1.2.0/24; EIGRP only performs autosummarization at the edgebetween two major networks.
172.30.1.0/24 和 10.1.2.0/24 EIGRP在两个较大的网络边缘只能执行自动汇总。
B. 172.30.0.0/16 and 10.1.2.0/24; R2 will perform autosummarization, although R1 will not.
C. Since R2 is configured without autosummarization, it will not propagate the 172.30.1.0/24 route. D. 172.30.0.0/8 and 10.0.0.0/8.
Answer: A
47. Which types of prefixes will a router running BGP most likely advertise to an IBGP peer, assuming it is not configured as a route reflector?
那种类型的前缀，在一个路由器运行BGP上最有可能通告给你一IBGP邻居，假设他没有配 置为一个路由反射器
A. prefixes received from any other BGP peer and prefixes locally originated via network statements or redistributed
从EBGP邻居收到前缀声明和前缀声明来自这个网络或重发布进来的。
B. all prefixes in its routing table
C. prefixes received from EBGP peers and prefixes locally originated via network statements or redistributed
D. prefixes received from EBGP peers and prefixes received from route reflectors
E. prefixes received from other IBGP peers, prefixes received from EBGP peers, and prefixes redistributed to BGP
F. prefixes received from other IBGP peers and prefixes received from route reflectors www.Examw.com
Answer: C
48. You have two EBGP peers connected via two parallel serial lines. What should you do to be able to load-balance between two EBGP speakers over the parallel serial lines in both directions?
你在两条串行线路上有两个EBGP邻居，怎么做来实现在两个EBGP邻居间的负载均衡
A. nothing, BGP automatically load-balances the traffic between different autonomous systems on all available links
B. peer between the eBGP speaker's loopbacks, configuring eBGP multihop as required, and use an IGP to load-share between the two equal-cost paths between the loopback addresses
用loopback接口建立EBGP邻居，必须配置BGP的多跳。在IGP中写入两个成本相同的到 EBGP邻居的Loopback口的路由
C. configure a loopback as update source for both EBGP peers and have on each AS an IGP to introduce two equal-cost paths to reach the EBGP peer loopback address; it is also necessary to use the next-hop-self command
D. use the ebgp-load-balance command on the neighbor statement on both sides E. configure a loopback as update source for both EBGP peers and have on each AS an IGP to introduce two equal-cost paths to reach the peer loopback address; it is also necessary to use the ebgp-multihop and next-hop-self commands
Answer: B
49. Which of these best identifies the types of prefixes a router running BGP will advertise to an EBGP peer?
哪一个是最能确认的前缀类型，在一个路由器和是他的EBGP邻居
A. prefixes received from any other BGP peer and prefixes locally originated via network
statements or redistributed to BGP
从一个BGP邻居收到的前缀，是本地的网络通告的或是重发布进入BGP的
B. all prefixes in its IP routing table C. only prefixes received from EBGP peers and prefixes locally originated via network statements or redistributed D. only prefixes received from EBGP peers and prefixes received from route reflectors E. all prefixes in its routing table except the prefixes received from other EBGP peers F. all prefixes in its routing table except the prefixes received from other IBGP peers
Answer: A
50. Which of these statements best describes the major difference between an IPv4-compatible tunnel and a 6to4 tunnel?
下面哪一个描述IPv4兼容通道和IPv6 to IPv4隧道的区别最好的一项
A. An IPv4-compatible tunnel is a static tunnel, but an 6to4 tunnel is a semiautomatic tunnel.
B. The deployment of a IPv4-compatible tunnel requires a special code on the edge routers, but a 6to4 tunnel does not require any special code.
C. An IPv4-compatible tunnel is typically used only between two IPv6 domains, but a 6to4 tunnel is used to connect to connect two or more IPv6 domains.
一个IPv4兼容的隧道通常只用两个IPv6的域，但一个6to4隧道是用来连接两个或多个连接 的IPv6域
D. For an IPv4-compatible tunnel, the ISP assigns only IPv4 addresses for each domain, but for a 6to4 tunnel, the ISP assigns only IPv6 addresses for each domain.
Answer: C
