[单选题]A Ezonexam PC has the IP address 172.16.209.10 /22. What is the subnet of this address?

正确答案 ：C

172.16.208.0

解析：解析：Explanation:

[单选题]IP地址为：192.168.50.70，掩码为：255.255.255.248，则该IP地址所在子网的广播地址为（）

正确答案 ：D

192.168.50.71

[多选题]What are two characteristics of "store and forward" switching? (Select two answer choices)

正确答案 ：BC

The switch receives the complete frame. before beginning to forward it.

Latency through the switch varies with frame. length.

解析：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)

正确答案 ：BC

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:

[单选题]哪个ACL可允许主机10.220.158.10访问web服务器192.168.3.244()

正确答案 ：D

access-list 101 permit tcp 10.220.158.10 0.0.0.0 host 192.168.3.224 eq 80

[单选题]网关的功能（）

正确答案 ：B

不同网段通信

[单选题]How can a Ezonexam administrator determine if a router has been configured when it is first powered up?

正确答案 ：C

An un configured router goes into the setup dialog

解析：解析：Explanation:

[单选题]OSPF在同一区域内，下列说法正确的是（）

正确答案 ：B

每台路由器的LSDB(链路状态数据库)都是相同的

[多选题]With regard to Ethernet media access methods, which of the following are true?(Choose all that apply.)

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.

解析：解析：Explanation:

[单选题]You have just purchased a brand new router and wish to have the router prompt you through the initial configuration commands. Which router mode does this describe?

正确答案 ：B

SETUP mode

解析：解析：Explanation:

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