正确答案: BC

A device listens and waits until the media is not busy before transmitting. All devices on an Ethernet segment see data that passes on the network medium.

题目：With regard to Ethernet media access methods, which of the following are true?(Choose all that apply.)

解析：解析：Explanation:

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举一反三的答案和解析：

[单选题]While troubleshooting a connectivity issue from a PC you obtain the following information:Local PC IP address: 190.0.3.35/24

TCP/IP not correctly installed

解析：解析：Explanation:

[单选题]How many usable IP addresses can you get from a conventional Class C address?

254

解析：解析：Explanation:

[单选题]配置路由器时，封装PPP协议的命令是：()

encap ppp

[多选题]Which of the following steps are necessary in order to add a new VLAN to the Ezonexam switched network? (Select all that apply)

Create the VLAN.

Name the VLAN.

Add the desired ports to the new VLAN.

解析：解析：Explanation:

[单选题]扩展IP访问权限表的表号范围是：()

100-199

[多选题]Regarding DHCP (dynamic host configuration protocol), which two of the following choices below are true? (Select two answer choices)

The DHCP Discover message uses FF-FF-FF-FF-FF as the Layer 2 destination address.

The DHCP Discover message uses UDP as the transport layer protocol.

解析：A,B 解析：Explanation:

[多选题]As the Ezonexam network administrator, you are required to have a firm understanding of the OSI model. Why does the data communication industry use the layered OSI reference model? (Choose two)

It encourages industry standardization by defining what functions occur at each layer of the model

It divides the network communication process into smaller and simpler components; thus aiding component development, design and troubleshooting

解析：解析：Explanation: