Final answer:
To review previous connections on a client side, use commands like 'netstat' in Command Prompt on Windows, or 'netstat' and 'lsof -i' on macOS, and browser history can also be checked for past web connections.
Step-by-step explanation:
To view previous connections on the client side, several methods can be used depending on the operating system and the specific type of connections you're referring to. If you're looking at network connections on a Windows system, you can utilize the built-in command called 'netstat' within the Command Prompt.
The command 'netstat -n' can display a list of active connections, their respective IP addresses, and port numbers. For seeing previously connected Wi-Fi networks, you can go to Network Settings and view the list of remembered networks.
On a macOS, you can use the Terminal and similar commands like 'netstat' or 'lsof -i' for active connections, and for Wi-Fi histories, access the system's network preferences or use the 'airport' utility from the command line. In Linux, the 'netstat' and 'ss' commands are valuable for checking active connections, while Wi-Fi histories can be checked via Network Manager or command line tools such as 'nmcli'.
Browser connections, such as sites visited, can typically be reviewed through the browser history, accessible via the browser's menu or using shortcut keys like Ctrl+H in most browsers.