Which command shows information about active ports and their state across Windows, macOS, and Linux?

Which command shows information about active ports and their state across Windows, macOS, and Linux?

• A. Arp
• B. Netstat
• C. Route
• D. Whois

Answer: (B)

Netstat is the command that reveals information about active ports and their state across Windows, macOS, and Linux. It lists open sockets, showing local and remote addresses and port numbers, along with the connection state such as LISTENING for ports waiting for connections or ESTABLISHED for active connections. This lets you quickly see which services are listening on which ports and which connections are currently in use, regardless of the operating system. Other commands have different purposes: Arp maps IP addresses to MAC addresses, Route displays the routing table, and Whois looks up domain ownership information, so they don’t provide the port-and-state view that Netstat does.

Netstat is the command that reveals information about active ports and their state across Windows, macOS, and Linux. It lists open sockets, showing local and remote addresses and port numbers, along with the connection state such as LISTENING for ports waiting for connections or ESTABLISHED for active connections. This lets you quickly see which services are listening on which ports and which connections are currently in use, regardless of the operating system. Other commands have different purposes: Arp maps IP addresses to MAC addresses, Route displays the routing table, and Whois looks up domain ownership information, so they don’t provide the port-and-state view that Netstat does.