2022思科认证模拟系统313

1. [单选题]扩展ACL和标准ACL的区别（）。

A. 标准的ACL在禁止和允许方面比扩展的ACL更高的精度
B. 扩展的ACL核查数据包的源地址^{(source address)}和目标地址和端口号^{(port number)}
C. 他们都可以查端口号^{(port number)}
D. 他们都可以查特殊协议和其他参数

2. [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

3. [单选题]IP地址为：192.168.50.70，掩码为：255.255.255.248，则该IP地址所在子网的广播地址为（）

A. 192.168.50.32
B. 192.168.80.64
C. 192.168.50.96
D. 192.168.50.71

4. [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

5. [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

6. [多选题]You need to configure an 802.1Q link on a Ezonexam switch. Which commands, when used together, would do this? (Select two answer choices)

A. Switch(vlan) mode trunk
B. Switch(config) switchport access mode trunk
C. Switch(config-if) switchport mode trunk
D. Switch(config-if) switchport trunk encapsulation dot1q
E. Switch(config) switchport access mode 1
F. F. Switch(vlan) trunk encapsulation dot1q

7. [多选题]Which three statements are true about the operation of a full-duplex Ethernet network, which is being used in the Ezonexam LAN? (Choose three)

A. Ethernet hub ports are preconfigured for full-duplex mode.
B. The host network card and the switch port must be capable of operating in full-duplex mode.
C. There are no collisions in full-duplex mode.
D. In a full-duplex environment, the host network card must check for the availability of the network media before transmitting.
E. A dedicated switch port is required for each full-duplex node.

8. [多选题]What are two characteristics of "store and forward" switching? (Select two answer choices)

A. Latency fluctuates regardless of frame. size.
B. The switch receives the complete frame. before beginning to forward it.
C. Latency through the switch varies with frame. length.
D. The switch checks the destination address upon receipt of headers.

9. [多选题]The Ezonexam network administrator needs to determine what LAN devices to install on the Ezonexam network. What are two advantages of using Layer 2 Ethernet switches over hubs? (Choose two)

A. Allowing simultaneous frame. transmissions
B. Increasing the size of broadcast domains
C. Increasing the maximum length of UTP cabling between devices
D. Filtering frames based on MAC addresses
E. Decreasing the number of collision domains

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