CCNP交换三道选择题答案不明确

xinxin_Ireland

各位考过CCNP交换的大神们，题库中的如下三题你们在考试中遇到过吗？到底要选什么？因为我听闫辉老师的讲解和网上搜索的答案和题库中给出的不同。我想知道考试时候，遇到这三道题应该选什么。非常感谢。

63 Which VTP mode is needed to configure anextended VLAN, when a switch is configured to use VTP versions 1 or 2? （此题有争议。老师认为是 A。 网友也同意选 A。但答案选D。）
A.transparent
B. client
C. server
D. Extended VLANs are only supported in version 3 andnot in versions 1 or 2.

127 On which interface can port security beconfigured?（此题有争议，老师认为选 C。题库答案是A）
A.static trunk ports
B. destination port for SPAN
C. EtherChannel port group
D. dynamic access point

165 Which option is the minimum number ofbindings that the DHCP snooping database can store?（网上答案是 B，题库答案是D。）
A.1000 bindings
B. 2000 bindings
C. 5000 bindings
D. 8000 bindings

Q9966

#63 VTP support:
“D”绝对不正确
思科文档： www.cisco.com/c/en/us/td/docs/sw ... html#d5200e247a1635

原文：
"There are 3 VTP versions: VTP version 1, version 2, and version 3. All VTP versions support both normal and extended range VLANs, but only with VTP version 3, does the switch propagate extended range VLAN configuration information".

Q9966

朋友，做一些努力搜索和阅读思科文档！

在本文档中可以找到＃165的答案....

http://www.cisco.com/c/en/us/td/ ... p.html#wp1101941%0A

我累了....

smallszg

127 On which interface can port security beconfigured?（此题有争议，老师认为选 C。题库答案是A）
A.static trunk ports
B. destination port for SPAN
C. EtherChannel port group
D. dynamic access point

这个A肯定是不对的  。 开端口安全需要在access 模式
trunk口敲命令得到下面的反馈：

xinxin_Ireland

smallszg 发表于 2016-12-16 12:46
127 On which interface can port security beconfigured?（此题有争议，老师认为选 C。题库答案是A）
A.s ...

谢谢你的回复。我看到外国的网站上，有网友如下回复：
Port security can be enabled on both access and static trunk ports. An example of configuring port security on a static trunk port is shown below:
Switch(config)# interface fastethernet 0/1
Switch(config-if)# switchport
Switch(config-if)# switchport mode trunk
Switch(config-if)# switchport port-security
We cannot configure port security on a dynamic interface. For example we will see an error when try it:

Switch(config)# interface fastethernet 0/1
Switch(config-if)# switchport
Switch(config-if)# switchport mode dynamic desirable
Switch(config-if)# switchport port-security
Command rejected: FastEthernet0/1 is a dynamic port.
我仍然非常疑惑。

xinxin_Ireland

Q9966 发表于 2016-12-16 12:01
朋友，做一些努力搜索和阅读思科文档！

在本文档中可以找到＃165的答案....

谢谢你的回复。我有看文档，所以才疑惑。
The DHCP snooping database can store 2000 bindings.
但是考试时候 选正确答案，是吧？而不是题库给的答案，对吗？

xinxin_Ireland

Q9966 发表于 2016-12-16 11:37
#63 VTP support:
“D”绝对不正确
思科文档： www.cisco.com/c/en/us/td/docs/switches/lan/catalyst385 ...

谢谢你的回复。

Q9966

xinxin_Ireland 发表于 2016-12-16 18:36
谢谢你的回复。我有看文档，所以才疑惑。
The DHCP snooping database can store 2000 bindings.
但是 ...

＃165是一个非常诡异的问题。
问题要求最低数 , 而不是最高数. "... is the minimum number" ...
所以哪个选项是最小的数字？ （提示：B和D都不是最小）

smallszg

xinxin_Ireland 发表于 2016-12-16 18:33
谢谢你的回复。我看到外国的网站上，有网友如下回复：
Port security can be enabled on both access an ...

我去查了下，看了应该是选A。   以前我只以为access口才能配置 prot-security。
cisco 官网上有个文档，可以去看下
http://www.cisco.com/c/en/us/td/ ... e/swcg/port_sec.pdf


With Release 12.2(18)SXE and later releases, port security supports nonnegotiating trunks.
– Port security only supports trunks configured with these commands:switchport
switchport trunk encapsulation
switchport mode trunk
switchport nonegotiate

12.2 之后静态trunk 是可以做port-sec的。  

With Release 12.2(18)SXE and later releases, port security supports IEEE 802.1Q tunnel ports.
• With releases earlier than Release 12.2(18)SXE, port security does not support IEEE 802.1Q tunnel
ports.
• Port security does not support Switch Port Analyzer (SPAN) destination ports.
• Port security does not support EtherChannel port-channel interfaces.

smallszg

xinxin_Ireland 发表于 2016-12-16 18:33
谢谢你的回复。我看到外国的网站上，有网友如下回复：
Port security can be enabled on both access an ...

我去查了下，看了应该是选A。   以前我只以为access口才能配置 prot-security。
cisco 官网上有个文档，可以去看下
http://www.cisco.com/c/en/us/td/ ... e/swcg/port_sec.pdf


With Release 12.2(18)SXE and later releases, port security supports nonnegotiating trunks.
– Port security only supports trunks configured with these commands:switchport
switchport trunk encapsulation
switchport mode trunk
switchport nonegotiate

12.2 之后静态trunk 是可以做port-sec的。  

With Release 12.2(18)SXE and later releases, port security supports IEEE 802.1Q tunnel ports.
• With releases earlier than Release 12.2(18)SXE, port security does not support IEEE 802.1Q tunnel
ports.
• Port security does not support Switch Port Analyzer (SPAN) destination ports.
• Port security does not support EtherChannel port-channel interfaces.