What does the connection timeout parameter in the HTTPS protocol mean and why is it needed?

The connection timeout parameter in the HTTPS protocol defines the maximum time to wait for establishing a TCP connection with the server. If the connection is not established within this time, the operation is aborted with a timeout error.

This is important to prevent infinite waiting in case of network issues or server unavailability. For example, if the server does not respond or the network is very slow, the connection timeout allows the client to quickly receive an error and take action (such as retrying or informing the user).

In Java, when using HttpURLConnection or libraries like OkHttp, you can configure this timeout to control the connection waiting time.