What is a login used for?

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A login is a way to prove who you are before accessing a secure system. It’s the set of information you enter to verify your identity—usually a username and a password, and sometimes an extra factor like a code from an authentication app or a hardware token. When you provide these correctly, the system confirms you are who you claim to be and grants access. A hardware device can help with authentication, but it’s not the login itself. An internet protocol is the method data uses to travel on the network, not your credential. A search engine is a tool for finding information, not the process of proving your identity. So the login is the credential used to authenticate and gain entry.