1. [单选题]OSI七层模型中，“段”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
2. [单选题]要把交换机的配置文件保存到tftp服务器，应使用的命令为（）
A. copy ios tftp
B. copy running-configt ftp
C. copy flash tftp
D. copy config tftp
3. [单选题]路由器上端口fa0/0,其最大传输速率是（）Mbit/s
A. 128
B. 10
C. 100
D. 1000
4. [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?
A. The data link layer
B. The application layer
C. The access layer
D. The session layer
E. The network layer
5. [多选题]As a Ezonexam trainee you are required to set the default gateway on a Cisco switch to the IP address of 192.168.1.115. Which IOS command should you use?
A. TestKSwitch(config) ip route-default 192.168.1.115
B. TestKSwitch(config) ip default-gateway 192.168.1.115
C. TestKSwitch(config) ip route 192.168.1.115 0.0.0.0
D. TestKSwitch(config) ip default-network 192.168.1.115
E. None of the above
6. [单选题]配置路由器时，封装PPP协议的命令是：()
A. encap ppp
B. ppp
C. group ppp
D. int ppp
7. [多选题]Using a subnet mask of 255.255.255.224, which of the IP addresses below can you assign to the hosts on this subnet? (Select all that apply)
A. 16.23.118.63
B. 87.45.16.159
C. 92.11.178.93
D. 134.178.18.56
E. 192.168.16.87
F. F. 217.168.166.192
8. [单选题]After connecting a PC to an available port on a switch, you find that the PC can not access any of the resources on the LAN. No other PC's connected to the switch appear to be having any issues. What is the most likely cause for this problem?
A. The router lacks a routing table entry for the new host
B. The host switch port is assigned to the incorrect VLAN
C. The host MAC address is incorrectly configured
D. A STP instance for the new host has not been initialized
E. The switch does not have the MAC address hard coded in the CAM table.
9. [多选题]属于私有IP段的是()
A. 10.0.0.0-10.255.255.255
B. 172.16.0.0-172.31.255.255
C. 202.110.100.0-202.110.100.255
D. 192.168.0.0-192.168.255.255
E. 126.0.0.0-126.255.255.255
10. [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?
A. 255.255.0.0
B. 255.255.224.0
C. 255.255.254.0
D. 255.255.255.0
E. 255.255.255.224
