What is the function of Finger in a network environment?

• A. It is used to compress network traffic.
• B. It is used to gather information about users on a network.
• C. It is used to scan IP ranges.
• D. It is used to protect passwords.

Answer: (B)

Finger is a simple information-retrieval service used to learn about user accounts on a remote host. When you query a user, the server can return details like the login name, the user's real or display name, what terminal they’re on, when they last logged in, and how long they’ve been idle. This makes it a handy, though old-fashioned, way to quickly gather who is present on a system or to enumerate usernames during a security assessment. It does not compress network traffic, it does not scan IP ranges, and it does not protect or manage passwords. In fact, because it can reveal user details, many administrators disable Finger to prevent information disclosure.