Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to understand computer system security needs [title] Analyze the operating system on the machine (s). [step] Security requirements will vary depending on which os and which version you are running. Make sure that the latest service packs and patches are installed.

Ending1: [title] Figure out the system's functional processes. [step] The system's main processes are hardware, data, raw-data usage, and importing and delivering data. Ending2: [substeps] Make sure that the os boot code does not include any encryption restrictions that might help. Other than software books and software, test the pc system to see if it has a graphics card. Ending3: [title] Analyze the environment in which your system will operate. [step] If your machine will not be in any local network and will never be connected to the internet, then you can be relatively sure of the system security. Ending4: You will need to correctly identify the os installed on the machine (s). Download an os reader or look for a modified installation guide, which can help you to understand system security.

Answer format: ending1/ending2/ending3/ending4