1. [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?
A. They are used to find the best path through a network.
B. They allow the exchange of filtering tables.
C. They specify different implementations of the Spanning-Tree Protocol.
D. They allow the exchange of routing tables
E. They provide inter-switch VLAN communication.
2. [单选题]为了连接“帧中继(frame relay)”线路，网络中的路由器需要提供的端口类型为（）
A. FastEthernet
B. Serial
C. BRI
D. Ethernet
3. [单选题]网关的功能（）
A. 过滤数据包
B. 不同网段通信
C. 校验数据帧
D. 把数据封装成“段”
4. [单选题]在路由器上，命令show access-list的功能是（）
A. 显示访问控制列表内容
B. 显示路由表内容
C. 显示端口配置信息
D. 显示活动配置文件
5. [单选题]OSPF在同一区域内(intra-region)，下列说法正确的是（）
A. 每台路由器生成的LSA都是相同的
B. 每台路由器的LSDB(链路状态数据库)都是相同的
C. 每台路由器根据该LSDB计算出的最短路径树都是相同的
D. 每台路由器根据该最短路径树计算出的路由都是相同的
6. [多选题]With regard to Ethernet media access methods, which of the following are true?(Choose all that apply.)
A. A device waits for an electronic signal before transmitting.
B. A device listens and waits until the media is not busy before transmitting.
C. All devices on an Ethernet segment see data that passes on the network medium.
D. Only the sender and the receiver devices see data that passes on the network medium.
E. Ethernet networks allow you to configured devises with higher transmission priority.
7. [单选题]帧中继(frame relay)环境中，在物理端口上，建立子接口的命令是（）
A. create
B. interface
C. encapsulation
D. ip address
8. [单选题]路由器的配置文件startup-config存放在()里
A. RAM
B. ROM
C. FLASH
D. NVRAM
9. [单选题]What is the purpose of the Spanning Tree Protocol (STP)?
A. To prevent routing loops
B. To create a default route
C. To provide multiple gateways for hosts
D. To maintain a loop-free Layer 2 network topology
E. To enhance the functions of SNMP
10. [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
