报文由应用层产生,被称作报文(Message)/数据(Data),经过传输层的封装形成报文段(Segment)/数据报(Datagram),再经过网络层的封装形成分组/数据包(Packet),然后经过数据链路层的封装形成帧(Frame),最后在物理层以二进制比特流的方式完成数据传输。在传输过程中,每层都会添加一些控制信息组成的首部,那些就是报文头。在...
message(消息)；传输层:segment(数据段)；网络层:datagram(数据报)，packet(数据包)；数据链路层:frame...
1.3、数据包的封装过程 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(frame)。数据封装成帧后发到传输介质上,到达目的主机后每层协议再剥掉相应的首部,最后将应用层数据交给应用程序处理。两台计算机在不同的网段中,那么数据从一台计算机到另一台计算...
What is an application-layer message? A transport-layer segment? A network layer datagram? A link-layer frame?相关知识点: 试题来源: 解析 答:(1) 应用层报文是位于应用层的信息分组。(2) 运输层报文段由应用层报文和运输层首部信息构成。(3) 网络层数据报由运输层报文段和网络层首部信息构成。(4) ...
Accesses a QUIC connection’s maximum DATAGRAM frame size. func nw_quic_get_max_udp_payload_size(nw_protocol_options_t) -> UInt16 Accesses the maximum length of a QUIC packet that can be received on a connection, in bytes. func nw_quic_get_remote_idle_timeout(nw_protocol_metadata_t)...
21.4.1Data frame Data frames have seven differentbit fields, as illustrated inFigure 21.3, these are: Sign in to download full-size image Figure 21.3.Data frame format • Start of frame – this defines the start of a data frame or a remote frame. It consists of a single dominant bit....
Domain, location, function, TTL and ID are specified by the initial creator of the message. The segment number is set as soon as the message enters the FCNN-based network, resulting in, e.g.,JohnDoe/RhomboidRight/RelAntibiot/7/3424/1. ...
“networkV4” — is set to the value of the IPv4.Datagram.NetworkKey field. Provides a hash constant value that is the difference between the source and destination IPv4 addresses under evaluation. Provides a faster comparison of the current IPv4 address pair. Segment evaluation — the line of...
When a station is configured with an incorrect address mask the effect is to confuse it as to whether a destination is remote or local. Because this incorrectly configured station doesn’t perform the correct masking of a destination address the whereabouts of the destination is judged incorrectly...
Identification (2 bytes): differentiates fragmented packets from other datagrams. Set by the NVGRE implementation as a globally incremented number. Flags (3 bits): Provides segment information such as identification of fragment status and controlling whether or not fragmentation can occur. Bit 1 — ...