To answer this question, you need to understand the concept of polling.
Option A) Simplex - This option is incorrect because simplex refers to a system that allows data to flow in only one direction, such as a simplex communication channel.
Option B) Base - This option is incorrect because base does not provide any information about whether the system has restarted, been reconfigured, or is out of service.
Option C) Polling - This option is correct. Polling is a method used by systems to check the status or availability of devices or resources. In this context, polling can be used to determine whether the system has restarted, been reconfigured, or is out of service.
Option D) Proxy - This option is incorrect because a proxy is an intermediary server that acts as a gateway between clients and other servers. It does not provide information about system restarts, reconfigurations, or outages.
The correct answer is C) Polling. This option is correct because polling is the method used to determine whether the system has restarted, been reconfigured, or is out of service.