需要了解TCP序列号和ACK号的帮助吗

序列号是如何生成的？假设发送方发送2个数据包：

序列号：68确认号：69长度：62字节
序列号：130确认号：131长度：62字节

然后从接收方接收序列号为131 og ACK number 130的数据包，发送方下次发送数据包时，序列号是什么？是131+62=193吗？

“当主机启动TCP会话时，其初始序列号实际上是随机的；它可以是0到4294967295之间的任意值，包括0和4294967295。”

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所以我们无法计算它？初始序列是由主机A的操作系统随机生成的。初始确认号设置为零，因为主机B尚未响应。当主机B作出响应时，其操作系统将生成一个Seq#，并且确认号将变为主机Seq#。每次交互只需将这些初始数字迭代1；下一次发送方发送数据包时，序列号将是131？我编辑了我的答案，试图包括一个例子。如果初始序列#是主机A的131，则在主机B响应之后。第二次主机A发送数据时，序列号#将为132，Ack#将为主机B的序列号#如果主机同时发送序列号为68和130的2个数据包会怎么样。主机A下次发送的是序列号131或130+68+1？当我得到问题的答案时，我会选择正确答案：）

At the sender:
- Send one packet, and keep track of its sequence number and
  transmission time
- Once an ACK is received for that packet, delete the stored
  sequence number, and send a new packet (using the same strategy
  of saving its sequence number and waiting for an ACK)
- If an ACK hasn't been received after timeout seconds since the
  packet's transmission time, retransmit it to the receiver.

 At the receiver:
- Upon receipt of packet k, send an ACK for packet k
- If k is greater than the last sequence number we received (or if
  we haven't received any packets yet), then deliver the packet to
  the application and keep track of k

Example :
Host A: Seq#: 111 Ack #: 0
Host B: Seq#: 222 Ack #: 112
Host A: Seq : 112 Ack#: 223