A Linux systems administrator is investigating a performance degradation issue on a critical application server. The administrator suspects that the issue might be caused by an excessive number of malformed packets being sent to the server from a specific client machine. To confirm this suspicion, the administrator needs to capture and examine the full contents of the network packets exchanged between the server and the client. Which of the following tools is BEST suited for this task?
The correct answer is tcpdump. The tcpdump command is a protocol analyzer used to capture and display the contents of packets on a network interface. This allows an administrator to perform deep packet inspection to analyze traffic, such as identifying malformed packets. nmap is a network scanner used for host discovery and port scanning, but it does not capture the full content of packets for analysis. netstat is used to display network connections, routing tables, and interface statistics, but it does not capture packet data. OpenSCAP is a tool for auditing system compliance against security policies and is not used for real-time packet analysis.
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