A Linux administrator is troubleshooting a performance issue where large data backups to a remote storage server are completing much slower than expected. The network infrastructure between the servers is rated for 1Gbps. The administrator wants to measure the actual maximum network bandwidth between the two Linux servers to determine if low throughput is the cause. Which of the following commands is the most appropriate tool for this specific task?
The correct answer is iperf3. This command is a network performance testing tool specifically designed to measure the maximum achievable bandwidth between two points, which directly addresses the problem of diagnosing low throughput.
The ping command is used to test network connectivity and measure latency (round-trip time), not network throughput.
The top command displays real-time information about system processes and resource usage like CPU and memory. While high system load can cause slow performance, top does not directly measure network throughput.
The ethtool command is used to query and configure network interface card (NIC) settings, such as link speed and duplex mode. While it can identify a misconfigured NIC that could cause low throughput, it does not measure the actual data transfer rate between two hosts.
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What is iperf3, and how does it measure network performance?
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Why is ping not suitable for measuring network bandwidth?
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