The IP header contains the source and destination IP addresses, the size, and other flags. The TCP segment header contains TCP port numbers, TCP control flags, and numeric values used for data ordering and integrity checking. Figure 4-4. IP packets carry TCP segments, which carry chunks of...
2、TCP/IP 网络协议栈分为应用层(Application)、传输层(Transport)、网络层(Network)和链路层(Link)四层。 通信过程中,每层协议都要加上一个数据首部(header),称为封装(Encapsulation),如下图所示 不同的协议层对数据包有不同的称谓,在传输层叫做段(segment),在网络层叫做数据报(datagram),在链路层叫做帧(fra...
MSS全称是 Maximum Segment Size,表示TCP握手时通信双方协商的最大报文段长度。 MSS计算方式: THE TCP MAXIMUM SEGMENT SIZE IS THE IP MAXIMUM DATAGRAM SIZE MINUS FORTY.(RFC879) 即MSS = MTU - IP HEADER(20字节) - TCP HEADER(20字节) RFC6691关于MSS的说明: When calculating the value to put in the...
连接 -- 下面条件不满足说明处于LISTEN状态if(_receiver.ackno().has_value()){// 如果当前已经建立了TCP连接// 那么向接收方发送下一个期望收到的ackno和当前自己的接收窗口大小seg.header().ack=true;// ackno()返回的是按序到达的最后一个字节的seqnoseg.header().ackno=_receiver.ackno().value();...
CTCP kann mit dem Befehl „netsh interface tcp set global congestionprovider=ctcp“ aktiviert werden. CTCP kann mit dem Befehl „netsh interface tcp set global congestionprovider=none“ deaktiviert werden.Die Größe des Fensterfelds im TCP-Header beträgt 16 Bit und ermöglicht einem ...
TCPSegment : tcp报文内存中的数据载体,主要负责Buffer和Tcp数据报结构体之间的序列号与反序列化 代码语言:javascript 代码运行次数:0 运行 AI代码解释 // tcp_segment.hhclassTCPSegment{private:TCPHeader _header{};// Buffer就是对String字符串相关操作的封装Buffer _payload{};public:// Parse the segment from...
The UDP Header Looking at the UDP header, you'll see there are much fewer fields in here. All we have is the source and destination port, the length, a UDP checksum, and the data. Comparing the UDP header and the TCP header, there's much less overhead with UDP, which leads us to...
To indicate the size of the receive window, the TCP header contains a 16-bit Window field. When the receiver gets data, it sends ACKs back to the sender indicating the successfully received bytes. In each ACK, the Window field notes the number of bytes remaining in the receive window. ...
Header Length Synopsis Identifies the size of the TCP header, in 32-bit multiples. Size Four bits. Notes The primary purpose of this field is to inform the recipient where the data portion of the TCP segment starts. Due to space constraints, the value of this field uses 32-bit multiples....
④ The segment represents the information in the TCP data stream;⑤ Message refers to the unit of data in the application protocol.In each layer, a header is attached to the sent data, which contains the necessary information of this layer, such as the destination address and protocol related...