多项选择题
A. If a switch is used, the collision domain is limited to each device and the switch
B. If a hub is used, the collision domain is limited to each device and the hub
C. If a hub is used, the collision domain includes all devices connected to the hub
D. If a switch is used, the collision domain includes all devices connected to the switch
多项选择题 Which two statements accurately describe a broadcast domain?（）
单项选择题 You need to control SSH, HTTP, and Telnet access to an MX240 router through any interface. You have decided to use a firewall filter. How should you apply the firewall filter?（）
单项选择题 Which account is used to access a Junos device in a factory-default configuration?（）