What type of information does 'netstat' display?

• A. TCP and UDP connection information
• B. File compression statistics
• C. Network packet analysis
• D. Remote access login attempts

Answer: (A)

The 'netstat' command is widely used in network management and troubleshooting because it provides critical insights into the state of network connections. Specifically, it displays information about the current TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) connections on a system. This includes active connections, their statuses, local and remote addresses, ports in use, and more. By displaying this information, 'netstat' helps users and administrators understand the current state of their network, including which ports are open and what external hosts are communicating with their machine.

The other choices refer to different types of information not provided by 'netstat.' File compression statistics would relate to data storage techniques rather than active network connections. Network packet analysis involves examining the packets that traverse a network, which typically requires specialized tools beyond what 'netstat' offers. Lastly, while 'netstat' can indirectly indicate active connections that may relate to remote access attempts, it does not specifically log or report on login attempts themselves. Thus, 'netstat' remains focused on current connection data, making it essential for network management tasks.