
【名词&注释】
路由器(router)、集线器(hub)、交换机(switch)、物理层(physical layer)、一对一(one to one)、是什么(what is)、数据链路层(data link layer)、第三层(layer 3)、源地址转换
[单选题]工作在OSI第三层(layer 3)的设备是:()
A. 网卡
B. 路由器
C. 交换机
D. 集线器
查看答案&解析
举一反三:
[单选题]Cisco IOS命令ip nat inside source static 10.1.1.5 172.35.16.5的作用是什么()
A. 为所有的外部NAT创建一个全局的地址池
B. 为内部的静态地址创建动态的地址池
C. 它为所有内部本地PAT创建创建了动态源地址转换
D. 为内部本地地址和内部全局地址创建一对一的映射关系
[多选题]The Ezonexam network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test? (Choose two)
A. ARP
B. CDP
C. DHCP
D. DNS
E. ICMP
[单选题]路由器上激活端口的命令是()
A. shutdown
B. no shutdown
C. up
D. noup
[单选题]OSI七层模型中,“包”是哪一层数据封装的名称()
A. 物理层
B. 数据链路层(data link layer)
C. 网络层
D. 传输层
[单选题]交换机上VLAN的功能描述中,正确的是()
A. 可以减少广播域的个数
B. 可以减少广播对网络性能的影响
C. 可以减少冲突域的个数
D. 可以减小冲突域的容量
[单选题]EIGRP的管理距离()
A. 90
B. 100
C. 110
D. 120
[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?
A. Full-duplex Ethernet consists of a shared cable segment. Half-duplex provides a point-to-point link
B. Full-duplex Ethernet uses two wires to send and receive. Half-duplex Ethernet uses one wire to send and receive
C. Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
D. Full-duplex Ethernet uses a loopback circuit to detect collisions. Half-duplex Ethernet uses a jam signal
E. None of the above
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