题库·思科认证
计算机类思科认证
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单选题

把指定端口添加到VLAN的命令是：()

A
vlan
B
vlan-member ship
C
vtp
D
switch port

题目答案

D

答案解析

暂无解析
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举一反三
单选题

在路由器上，命令show access-list的功能是（）

A
显示访问控制列表内容
B
显示路由表内容
C
显示端口配置信息
D
显示活动配置文件

题目答案

A

答案解析

暂无解析
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单选题

You wish to segment your LAN into multiple broadcast domains. Which technology method should you implement in order to do this?

A
Transparent bridging
B
Cut-through switching
C
Fragment-free switches
D
Virtual LANs
E
Store-and-forward switching
F
None of the above

题目答案

D

答案解析

解析：EXPLANATION:THE CREATION OF VLANS IN A SWITCH WILL PROVIDE SEPARATE BROADCAST DOMAINS. BY DEFAULT, ALL PORTS IN A CATALYST SWITCH BELONG TO VLAN 1. BY CREATING ADDITIONAL VLANS, THE LAN WILL BE LOGICALLY SEGMENTED INTO SEPARATE BROADCAST DOMAINS.INC
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单选题

Ezonexam has a Class C network and you need ten subnets. You wish to have as many addresses available for hosts as possible. Which one of the following subnet masks should you use?

A
255.255.255.192
B
255.255.255.224
C
255.255.255.240
D
255.255.255.248
E
None of the above

题目答案

C

答案解析

Explanation:Usingthe2n-2formula,wewillneedtouse4bitsforsubnetting,asthiswillprovidefor24-2=14subnets.Thesubnetmaskfor4bitsisthen255.255.255.240.IncorrectAnswers:A.Thiswillgiveusonly2bitsforthenetworkmask,whichwillprovideonly2networks.B.Thiswillgiveus3
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单选题

What is the subnet for the host IP address 201.100.5.68/28?

A
201.100.5.0
B
201.100.5.32
C
201.100.5.64
D
201.100.5.65
E
201.100.5.31
F
201.100.5.1

题目答案

C

答案解析

解析：EXPLANATION:THIS QUESTION IS MUCH EASIER THEN IT APPEARS WHEN YOU CONVERT IT TO BINARY AND DO THE BOOLEAN OPERATION AS SHOWN BELOW:IP ADDRESS 201.100.5.68 = 11001001.01100100.00000101.01000100/28 MASK = 11111111.11111111.11111111.11000000AND RESULT
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单选题

On a half-duplex Ethernet LAN, two hosts attempt to send data simultaneously, resulting in a collision. Following this collision, what will the hosts do? (Select all valid answers)

A
The destination host sends a request to the source for retransmission.
B
The jam signal indicates that the collision has been cleared.
C
The hosts will attempt to resume transmission after a time delay has expired.
D
An electrical pulse indicates that the collision has cleared.
E
The router on the segment will signal that the collision has cleared.
F
The hosts will do nothing, as the higher layers are responsible for data error correction and re-transmission.

题目答案

C

答案解析

解析：EXPLANATION:WHEN A HOST ON AN ETHERNET LAN HAS INFORMATION TO SEND, THE FOLLOWING STEPS ARE TAKEN:1. A DEVICE WITH A FRAME. TO SEND LISTENS UNTIL ETHERNET IS NOT BUSY.2. WHEN THE ETHERNET IS NOT BUSY, THE SENDER BEGINS SENDING THE FRAME.3. THE SENDE
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