1. [多选题]请选出交换机处理帧的三种模式：()
A. 直通模式
B. 存储转发模式
C. 侦测模式
D. 分段模式
E. 阻塞模式
2. [多选题]You need to describe the various types of flow control to your co-workers. Which of the following are types of flow control that can be used in a network? (Choose three)
A. Congestion avoidance
B. Windowing
C. Cut-through
D. Buffering
E. Load Balacing
F. F. Fast Forward
3. [单选题]下列哪个network命令会告知此路由器开始使用IP地址为10.1.1.1、10.1.100.1和10.1.120.1的接口上的OSPF（）
A. network 10.0.0.0 255.0.0.0 area 0
B. network 10.0.0.0 0.255.255.255 area 0
C. network 10.0.0.1 0.0.0.255 area 0
D. network 10.0.0.1 0.0.255.255 area 0
4. [单选题]通配符掩码和子网掩码之间的关系是（）。
A. 两者没有什么区别
B. 通配符掩码和子网掩码恰好相反
C. 一个是十进制(decimal system)的，另一个是十六进制(hexadecimal system)的
D. 两者都是自动生成的
5. [单选题]通过路由器的“配置端口console”对路由器进行配置，应该使用的线缆为（）
A. 交叉线缆
B. 直通线缆
C. 反转线缆
D. 任意线缆
6. [多选题]对于IP为199.41.27.0，子网掩码为255.255.255.240，则该IP地址和子网掩码相作用会得到一系列IP，从下列选项中选出属于“有效IP”的选项：()
A. 199.141.27.33
B. 199.141.27.112
C. 199.141.27.119
D. 199.141.27.126
E. 199.141.27.175
F. F.199.141.27.208
7. [单选题]A Ezonexam technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the show cdp neighbors command.In which OSI layer is the problem most likely occurring?
A. Physical
B. Data link
C. Network layer
D. Transport layer
E. Application layer
8. [单选题]如果网络中的路由器都是cisco路由器，则优先选择(priority selection)哪一个路由协议（）
A. RIP
B. EIGRP
C. IGRP
D. OSPF
9. [单选题]为了使配置私有IP的设备能够访问互联网，应采用的技术是()
A. NAT
B. VLAN
C. ACCESS-LIST
D. DDR
10. [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?
A. All defined VLANs are allowed on the trunk by default.
B. Each VLAN, or VLAN range, that is specified with the switchport mode command.
C. Each VLAN, or VLAN range, that is specified with the vtp domain command.
D. Each VLAN, or VLAN range, that is specified with the vlan database command.
E. None of the above
