TCP连接的可靠性如何？ [英] How reliable is a TCP connection?

问题描述

我一直在写服务器客户端application.Server用c＃编写，客户端代码用java编写。通信协议是TCP。

I have been writen server-client application.Server is coded in c# and the client code writen using java.The communication protocol is TCP.

传输文件时使用tcp可以发送丢失的数据。换句话说，tcp保证数据正确到达。（我应该发送此文件的头信息以检查错误，如文件大小，哈希等。）

While transfering a file using tcp is it possible to send missing data. In other words does tcp guarantee that data arrives correctly.(Should I send header information for this file in order to check errors , like file size , hash etc.)

推荐答案

tcp传输的软件包的顺序可靠。

The ordering of the packages of a tcp transmission os reliable.

例如，你的tcp消息分为三个包A，B和C。

For example your tcp message is split in three packages A, B and C.

您的客户端收到A，包B丢失，然后客户端收到C.在流中，您将只获得包A，包C被存储并且很快包B由您的客户重新发送和接收，在流中您将获得包B，然后是C。

Your client receives A, package B gets lost and then the client receives C. In the stream you will get only package A, package C is stored and as soon package B is retransmitted and received by your client, in the stream you will get package B and then C.

如果包B通过另一种方式路由，则完成相同的操作因此在包C之后收到。

The same is done if package B is routed throug another way and is therefor received after package C.

此机制需要tcp头中的序列号字段。

The field 'Sequence Number' in the tcp header is needed for this mechanism.

这篇关于TCP连接的可靠性如何？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！