TP-Link TL-WR642G - Manual (Page 73)

TL-WR642G 108M Wireless Router User Guide
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UDP Tx
The total amount of the UDP packets transmitted to WAN in the last
Packets Statistic interval seconds.
TCP
SYN Tx
The total amount of the TCP SYN packets transmitted to WAN in the last
Packets Statistic interval seconds.
Click the Save button to save the Packets Statistic interval value.
Click the Auto-refresh checkbox to refresh automatically.
Click the Refresh button to refresh immediately.