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Check TCP Statistics with netstat -s

Inspect retransmissions, errors, and connection resets per protocol to see if the network stack itself is struggling.

WindowsnetworkcmdDiagnosticsLow risk
Run `netstat -s -p tcp` to view TCP counters such as segments retransmitted, errors, and resets; use -p udp for UDP.

01Command

Command
$ netstat -s -p tcp

02What it does

When downloads crawl but ping looks fine, retransmit and error counters often reveal the story. netstat -s prints cumulative since boot, so sample twice with a gap to see the rate. Rising retransmissions alongside a Wi-Fi adapter points to signal problems; reset counts climbing after a specific app starts can expose it.

03Risk

RiskLow risk
RequirementsBuilt into Windows 10/11; some sections are more complete in an admin prompt.

04Undo

✓No undo needed — this command does not change persistent state.

05Sources

  • netstat
    Microsoft Learn · vendor-doc · 2026-09-17
    Evidence: Reference documents -s (per-protocol statistics) and -p (limit output to the TCP or UDP protocol).
  • Netstat — Display TCP/IP statistics
    SS64 · technical · 2026-09-17
    Evidence: Documents NETSTAT -s -p TCP for protocol-specific statistics including errors and resets.

Last verified: 2026-09-19 · Category: Network

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