a. Window size value:窗口的大小;(TCP头部) b.Calculated Window size:放大后窗口的大小,也就是实际可用的大小 c. Window scale:窗口可以放大的倍数,也就是Calculated Window size最大等于Window size value 乘以 2 的 Window scale 次方(TCP options中) 如:Window size value如果等于1024,Window scale等于7,那...
net.ipv4.tcp_window_scaling 控制开关。注意携带这个 option 之后的包才会放大，所以当前这个包 wireshark 输出的 Calculated window size 并没有乘以系数，后续的包才乘（这个 option 只在握手的时候交换信息，如果抓的包不包含握手包的话，是无法精确知道实际的 window size 的）。$ sysctl net.ipv4.tcp_window_...
The receive window size defaults to a value calculated as follows:The starting value of the receive window size is determined from the registry settings for GlobalMaxTcpWindowSize, the global TcpWindowSize, and the adapter specific TcpWindowSize, according to the following logic: TcpWindowSize is...
Options中的Window scale:窗口可以放大的倍数,也就是Calculated Window size最大等于Window size value 乘以 2 的 Window scale 次方 比如Window size value如果等于1024,Window scale等于7,那么Calculated Window size最大可以等于1024*128=131072 传输过程中,可以在抓包的数据中看到Win字段的大小就是目前TCP接收方可用...
The receive window size defaults to a value calculated as follows:The starting value of the receive window size is determined from the registry settings for GlobalMaxTcpWindowSize, the global TcpWindowSize, and the adapter specific TcpWindowSize, according to the following logic: TcpWindowSize is...
中期这里的 Calculated Window Size 明显增大了,到了 445312 字节。再看看后半程: 最后阶段已经达到 863800 字节。综合这三个阶段来看,折中值差不多在 400KB 左右,我们把它除以 RTT 0.029 秒,得到的是 400KB/0.029s=13790KB/s。显然,这个数值远超过前面 I/O Graph 里看到的 300~400KB/s。这是怎么回事呢?
Window size value: 64240 #窗口大小 Calculated window size: 64240 #估计的窗口大小 Window size scaling factor: -2 (no window scaling used) #窗口大小缩放比例因素 Checksum: 0x16cb [validation disabled] #校验和 Good Checksum: False Bad Checksum: False ...
Window size value: 64240 [Calculated window size: 64240] Checksum: 0x488e [unverified] [Checksum Status: Unverified] Urgent pointer: 0 Options: (20 bytes), Maximum segment size, SACK permitted, Timestamps, No-Operation (NOP), Window scale ...
... ...0 = Fin: Not set Window size value: 40960 [Calculated window size: 40960] [Window size scaling factor: -1 (unknown)] Checksum: 0xed6d [validation disabled] [Good Checksum: False] [Bad Checksum: False] Urgent pointer: 0 [SEQ/ACK analysis] [Bytes in flight: 99] Telnet Data...
因为TCP的Window Size是16 bit数,所以最大表征64K字节;当需要表征的数目大于这个数字的时候,就需要新增'Window Scale',此时真实的Window Size为: Real Window Size (Calculated Window Size) = Window Size Value x 2^(Window Scale in bits) 客户端的Window Scale 在SYN packet中 ...