Which command is used to display the hostname of a computer?

• A. Host
• B. Hostname
• C. Netstat
• D. Systeminfo

Answer: (B)

The command used to display the hostname of a computer is "hostname." This command, when executed in a command-line interface, retrieves and displays the name assigned to the system on the network. The hostname serves an important function as it provides a unique identifier for the computer, allowing it to be recognized within a network environment.

This command is often used by system administrators for troubleshooting and network configuration tasks, ensuring that systems can be properly identified and managed based on their designated names. In contrast, other options such as "host," "netstat," and "systeminfo" serve different purposes, such as querying DNS information, displaying active network connections, and providing a detailed configuration overview of the system, respectively, but they do not specifically display the hostname.