单项选择题 An administrator is experiencing availability issues on a Linux server. The administrator decides tocheck the server for an IP address conflict on the server. Which of the following commands should the administrator use?（）

单项选择题 Which of the following defines access for a network?（）

多项选择题 Which of the following ports would have to be allowed through a firewall to allow SNMP traffic topass on its default port?（） (Select TWO).