Refer to the exhibit.The following commands are executed on interface fa0/1 of 2950Switch.
2950Switch(config-if)# switchport port-security
2950Switch(config-if)# switchport port-security mac-address sticky
2950Switch(config-if)# switchport port-security maximum 1
The Ethernet frame that is shown arrives on interface fa0/1. What two functions will occur when this frame is received by 2950Switch?
  • 1、
【正确答案】 1、B,D    
【答案解析】考点:考查交换机端口安全。maximum 1说明只允许一个mac通过。
A:添加ffff.ffff.ffff到mac地址表,错误。这是个arp报文,把数据包源mac添加到mac表。
B:仅允许主机A通过f0/1,正确。
C:当2950switch收到帧后丢弃,错误。应该是除f0/1外所有端口洪泛。
D:当2950switch收到目的为0000.00aa.aaaa的数据帧会从f0/1转发,正确。
E:主机B和C的数据帧会从f0/1转发,但从其他交换接收到的不会,错误。