[单选题]Given that you have a class B IP address network range, which of the subnet masks below will allow for 100 subnets with 500 usable host addresses per subnet?

正确答案 ：C

255.255.254.0

解析：解析：Explanation:

[单选题]While troubleshooting a connectivity problem on the network, you issue the ping command from your PC command prompt, but the output shows "request times out."At which OSI layer is this problem associated with?

正确答案 ：E

The network layer

解析：解析：Explanation:

[多选题]When you compare the differences between half-duplex and full-duplex Ethernet, which of the following characteristics are exclusive to half-duplex? (Select two answer choices)

正确答案 ：AD

Half-duplex Ethernet operates in a shared collision domain.

Half-duplex Ethernet has lower effective throughput.

解析：解析：Explanation:

[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)

正确答案 ：C

The hosts will attempt to resume transmission after a time delay has expired.

解析：C 解析：Explanation:

[单选题]交换机转发数据到目的地依靠()

正确答案 ：B

MAC地址表

[单选题]You need to decide on which trunking method to implement in the Ezonexam network. What is a characteristic of ISL and 802.1q frame. tagging in a switched LAN environment?

正确答案 ：E

They provide inter-switch VLAN communication.

解析：解析：Explanation: A trunk link is the other type of Layer 2 port supported on Cisco switches. When a trunk port is configured, it begins marking frames as they exit the port to indicate which VLAN each frame. is associated with.

[单选题]路由表中，某条路由的“路由代码为D”，则表明该路由为（）

正确答案 ：D

EIGRP路由

[单选题]A new Ezonexam switch is installed into an existing LAN and a new VTP trunk is set up with an existing switch. Which VLANs will be allowed on this new trunk?

正确答案 ：A

All defined VLANs are allowed on the trunk by default.

解析：解析：Explanation:

[多选题]Two stations on the Ezonexam LAN transmit at the same time, resulting in a collision. What happens when a collision occurs on the network? (Choose all that apply)

正确答案 ：BDE

A jam signal informs all devices that a collision occurred.

The devices that are involved in the collision stops transmitting for a short time.

The collision invokes a random back-off algorithm.

解析：解析：Explanation:

[单选题]OSPF骨干区的区域编号为（）

正确答案 ：C

0.0.0.0

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