单项选择题 An administrator is using a protocol analyzer to monitor traffic between two servers. However, the only traffic that appears is broadcast and traffic originating from the administrators PC. Which of the following devices is the administrator plugged into? （）

单项选择题 A network technician is installing a new managed 10/100 Mbps switch on the network. The network has an older printer with a 10Mbps network adapter that will be moved to the new switch. Which of the following settings on the switch will need to be configured to support the printer?（）

单项选择题 Which of the following would be used to test out the security of a specific network by allowing it toreceive security attacks?（）