To test the message overhead, you will use tcpdump; run it in a third window, then run the script size-client.py (with the server still running).

要测试消息开销，您要使用 tcpdump ；在第三个窗口中运行它，然后运行脚本 size-client.py （此时服务器仍在运行中）。

youdao

At that second knock, a window on the third floor opened and the same Snail looked out.

第二次敲门时，三楼的一扇窗户打开了，还是那只蜗牛往外看。

youdao

He jumped out of a third-floor window.

他从3楼的一个窗口跳了出去。

《柯林斯英汉双解大词典》

A third teacher said Paul looked out the window instead of looking at her.

VOA: special.2009.04.04

As a result, hoisting a decorative wrought iron window filligree onto, say, a circular third-floor window can be done with almost no effort.

FORBES: Homes With Fake Brick, Stone And Wood Exteriors

Elwood (Woody) Norris hangs out of a third-floor window of an office building in New York.

FORBES: Magazine Article

Mr Hughes, a teacher from Cheslyn Hay, Staffordshire, jumped from a third-floor window after trying in vain to save his mother.

BBC: Penhallow Hotel fire