[单选题]关于静态NAT，下面（）说法是正确的。
正确答案 ：C
静态NAT将内部地址一对一静态映射到内部全局地址
[单选题]两个VLAN之间要想通信，应该使用的设备是（）
正确答案 ：C
路由器
[单选题]When is a switched network that is running the Spanning Tree Protocol considered to be fully converged?
正确答案 ：D
when every operating switch port is in either the blocking or forwarding state
解析：解析：Explanation:
[单选题]OSI七层模型中，数据链路层的数据封装名称为（）
正确答案 ：B
帧
[单选题]The Ezonexam LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?
正确答案 ：C
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
[单选题]After working all night and successfully configuring a Cisco router for the Ezonexam network you save your changes on the startup config, reboot the router, and go out for a cigarette. When you return, none of your changes are active and the router boots to the initial configuration mode! Which of the choices below indicates the source of your problem?
正确答案 ：C
Router configuration-register set to bypass startup configuration
解析：解析：Explanation:
[单选题]You want to upgrade the Ezonexam LAN so that all ports operate in full duplex mode. Which statement is true about full-duplex Ethernet when comparing to half-duplex Ethernet?
正确答案 ：C
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
[单选题]在OSPF的DR/BDR选举过程中，在路由器有相同的接口优先级情况下，什么用于确定DR或BDR（）
正确答案 ：D
路由器ID
[单选题]对于路由表，下列说法中正确的是：（）
正确答案 ：B
在缺省的情况下，如果一台路由器同时运行了RIP和OSPF两种动态路由协议，则在路由表中只会显示OSPF发现的路由，因为OSPF协议的优先级更高
[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.
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