无色无味(杨波) 的Web Log(博客)

No.2
An administrator is configuring a Catalyst switch with VLAN information that
must be automatically distributed to other Catalyst switches in the network.
What  conditions  must be met in order for the VLANs configured on this
switch to be automatically  configured on the other switches?(Choose-three.)
A.The Switch that will share its VLAN configuration must be in VTP server
mode.
B.The switches must be in the same VTP domain.
C. The switch that will share the VLAN information  must  be configured as
root bridge.
D.The   switches must be connected over VLAN trunks
E. The switches must be configured  to use   the same STP version·
F.The switches must have VTP pruning activated.

答案:
ABD
考题分析:
本题目考察对 VTP协议的掌握，以及 VLAN之间互连时应该注意的事项，ABD
三个选项是必须记住的细节。

3.Refer to the topology and configuration  information shown in the graphic. The
router has been configured to provide communication beteween the
VLANs.which IOS commands are required to configure switch port fa0/1 to
estabilsh a link with router R1 using   the IEEE standard protocol (Choose
three)

A.Switch(config)#interface fastethernet 0/1
B.Switch(config-if}#switchport mode access
C.Switchf(config-if)#switchport mode trunk
D.Switch(config-if)#switchpart access vfan 1
E.Switch(config-if)#switchport trunk encapsulation Isl
F.Switch(config-if)#switchport trunk encapsulation dot1q

答案:
ACF
考题分析:
本题目考察的是中继端口配置时的细节和相关步骤， 以及封装的协议。

No.4
Why would a network administrator configure port security on a switch?
A. to prevent unauthorized Telnet access    to a switch port
B. to limit the number of layer 2 broadcasts on a particular switch port
C. to prevent unauthorized hosts from accessing the LAN
D，to  protect the IP and MAC address of the switch and associated ports
E. to block  unauthorized access to  the switch management interfaces over
common TCP ports

答案:
C
考题分析:
我们可以将交换机的端口设置成一种认证的模式，也就是说，只能接经过认证
的主机。这么做的目的就是提高安全性。

No.5
How can an administrator determine If a router has been configured when It Is
first powered up?
A.A configured router prompts for a password.
B.A configured router goes to the privlleged mode prompt
C. An unconfigured router goes into the setup dialog
D. An unconfigured route r goes to the enable mode prompt
 
 
 
 
 
 
 
 
答案:
C
答案解析：
当一个路由器第一次开机的时候，因为没有配置文件，所以会进入设置模式，
进行初次设置。

No.6
What value is primarily used to determine which port becomes the root port on
each nonroot switch in a spanning 一 tree topology?
A. path cost
B. lowest port MAC address
C. VTP revision number
D. highest port priority number
E. port priority number and MAC address

答案:
A
答案解析：
这道题目问的是对交换机设置根端口的时候优先使用的值是什么？路径的度量
值是必须优先考虑的。

No.7
Refer to the exhibit. Haw can a network administrator ensure that the STP
election process would result in    Switch B being elected as root  switch?
 
A. Clear the Switch B STP revision number.
B. Assign Switch B a low priority number
C. Increase the Switch B priority number.
D. Change the MAC address of Switch B.

答案:
B
答案解析：
在一个交换网络中，交换机的优先级数字越小，越容易成为根交换机。