NA题库QUESTION 75和QUESTION 152疑惑

doofy

快要考试了，这两道题不确定到底应该选什么，有考试遇到过的同学吗？
QUESTION 75
Which three approaches can be used while migrating from an IPV4 addressing scheme to an IPV6
scheme.(choose three)
A. statically map IPV4 address to IPV6 addresses
B. configuration IPv4 tunnels between IPV6 islands
C. use DHCPv6 to map IPV4 addresses to IPV6 addresses
D. use proxying and translation to translate IPV6 packets into IPV4 packets
E. configure IPV6 directly
F. enable dual-stack routing

鸿鹄题库答案是：ABF
在9tut上看到是：BDF

question 75

（http://www.9tut.com/new-ccna-ipv6 下的question 7）


QUESTION 152
Users on the 172.17.22.0 network cannot reach the server located on the 172.31.5.0 network.The network
administrator connected to console port,issued the show ip route command,and was able to ping the
server.Based on the output of the show ip route command topology shown in the graphic,what is the cause
of the failure?

question 152

A. IP routing is not enabled
B. A static route is configured incorrectly
C. The network has not fully converged
D. The FastEthernet interface on Coffee is disabled
E. The routing table on Coffee has not updated
F. The neighbor relationship table is not correctly updated

答案选的：D，但是在一些地方选的是B，但是没有was able to ping the server这句话。
（http://bbs.hh010.com/thread-398165-1-2.html  这里也有一个同学在讲这道。）

另外大家有没有总结一下哪些题比较有争议之类的？

小乔

题库的答案都是经过考试验证的

csimonca

在9tut上己经更正了题目！
Users on the 172.17.22.0 network cannot reach the server located on the 172.31.5.0 network. The network administrator connected to router Coffee via the console port, issued the show ip route command. Based on the output of the show ip route command and the topology shown in the graphic, what is the cause of the failure?

本人认为，正确应选:  A static route is configured incorrectly.
这题目是胡乱出的，看拓扑图，如没有其它接口或出口，这条static静态路由根本敲不进去，因为没有下一跳的接口，除非指向Null 0接口。
本人为了这个做了实验，如果选:
D. The FastEthernet interface on Coffee is disabled
在Coffer#show ip route
                c  172.17.22.0 is directly connected, FastEthernet0/0   //如果FastEthernet0/0 disabled, 这直连接口根本不会出现在路由表中

不知我的意见对不对，还望指教。

csimonca

这个图会请楚些。

csimonca

QUESTION 75
Which three approaches can be used while migrating from an IPV4 addressing scheme to an IPV6
scheme.(choose three)
可以选: A. statically map IPV4 address to IPV6 addresses
根据这文章---地址是<http://www.brocade.com/downloads ... tml&single=true>
NAT46 static mapping configuration
In NAT46 configurations using static mapping, the mapping table used to match IPv4 and IPv6 addresses is populated manually using the nat64 map command.
Route injection can be used in advanced static mapping configurations to inject IPv4 and IPv6 addresses into the respective network routing tables. Route distribution is then performed using any one of the routing protocols supported by ServerIron ADX: OSPF, IS-IS, and BGP (IPv4 to IPv6).
This section is divided into three topics:
1. Basic NAT46 static mapping configuration: This topic describes the tasks required to configure a basic stateless NAT46 gateway.
2. Stateless NAT46 static mapping configuration with route injection: This topic describes the tasks required to configure a stateless NAT46 gateway that uses static route injection.
3. Stateless NAT46 packet fragmentation configuration: This topic describes the options available for handling packet fragmentation in a stateless NAT46 gateway.

csimonca

回复须审核是什么意思？？？？

csimonca

QUESTION 75
Which three approaches can be used while migrating from an IPV4 addressing scheme to an IPV6
scheme.(choose three)
可以选: A. statically map IPV4 address to IPV6 addresses

教程:
NAT46 static mapping configuration
In NAT46 configurations using static mapping, the mapping table used to match IPv4 and IPv6 addresses is populated manually using the nat64 map command.
Route injection can be used in advanced static mapping configurations to inject IPv4 and IPv6 addresses into the respective network routing tables. Route distribution is then performed using any one of the routing protocols supported by ServerIron ADX: OSPF, IS-IS, and BGP (IPv4 to IPv6).

Configuring basic NAT46 static mapping
In static NAT46 configurations, use the nat64 map command to specify an IPv4 address and map that IPv4 address to the IPv6 address of a resource. Enter a command such as the following:
ServerIron ADX(config)# nat64 map 201.1.1.100 2001:db8:8000::100
Syntax:         [no] nat64 map < ipv4-address> < ipv6-address>
The <ipv4-address> variable specifies an IPv4 address for the IPv4-IPv6 mapping. The <ipv6-address> variable specifies an IPv6 address for the IPv4-IPv6 mapping.
NOTE: A maximum of 1024 entries is supported in the mapping table. Entries can be defined manually using the nat64 map command or dynamically using real-time or prefetched dynamic mappings. For more information, refer to “Populating the NAT46 mapping table”.