网络通信问题----请高手回答

Question

╭─────────────╮                     ╭─────────────╮
│                          │                     │                          │
│                          │    ┌────┐     │                          │
│         局域网           │──│internet│── │         局域网           │
│                          │    │        │     │                          │
│                          │    └────┘     │                          │
│                          │                     │                          │
╰─────────────╯                     ╰─────────────╯
      │       │.........                                    │      │             
      │       │                                             │      │             
    ┌─┐   ┌─┐                                         ┌─┐   ┌─┐       
    │A │   │B │                                         │ C│   │D │       
    └─┘   └─┘                                         └─┘   └─┘       
 如果主机A 的IP是192.168.0.10 而主机C的IP也是192.168.0.10(或者其它)，请问主机A和主机C如何
 建立连结(网络通信)，编程如何实现，分不够再加

Answer 1

╭────────────╮                     ╭─────────────╮
│                        │                     │                          │
│                        │    ┌────┐     │                          │
│         局域网         │──│internet│── │         局域网           │
│                        │    │        │     │                          │
│                        │    └────┘     │                          │
│                        │                     │                          │
╰────────────╯                     ╰─────────────╯
      │       │.........                                    │      │             
      │       │                                             │      │             
    ┌─┐   ┌─┐                                         ┌─┐   ┌─┐       
    │A │   │B │                                         │ C│   │D │       
    └─┘   └─┘                                         └─┘   └─┘

Answer 2

╭────────────╮                     ╭──────────╮
│                        │                     │                    │
│                        │    ┌─────┐   │                    │
│         局域网         │──│internet  │─ │         局域网     │
│                        │    │          │   │                    │
│                        │    └─────┘   │                    │
│                        │                     │                    │
╰────────────╯                     ╰──────────╯
      │       │.........                               │      │         
      │       │                                        │      │             
    ┌─┐   ┌─┐                                    ┌─┐   ┌─┐    
    │A │   │B │                                    │ C│   │D │  
    └─┘   └─┘                                    └─┘   └─┘

Answer 3

好复杂，去看看NAT打洞的相关介绍，一搜一大把

Answer 4

A 和C  只能用UDP走通，TCP也能（太复杂了^_^)走UDP的
看一下以前讨论过的帖子

Answer 5

http://www.ppcn.net/n1306c2.aspx（很经典的文章 ^_^)

Answer 6

关于NAT打洞的问题，需要第三方服务器来完成，如果没有第三方服务器，能不能完成打洞。
谢谢上面的回答

Answer 7

tcp/ip协议不行吗？qq是怎么实现的？
用tcp/ip协议提交到服务器，服务器再转发给另一个网络内的机子。
至少，与internet上的服务器通信，我局渔网内的机子是没问题的。