1.4. Conclusion

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本文介绍了使用ifconfig和route工具进行IP网络配置的基本方法。要使两个以太网内的主机能够相互通信，需要确保每台主机都有良好的以太网连接，并且共享相同的网络地址、子网掩码和广播地址；每个主机必须拥有唯一的IP地址；同时，任何一台主机都不能阻止另一台主机的数据包。

1.4. Conclusion

This chapter has introduced the simplest uses of ifconfig and route to view and alter the IP configuration of a host. To reiterate the minimum requirements to create an IP network between two machines:

Requirements for Two Hosts on the Same Ethernet to Communicate Using IP

Each host must have a good connection to the Ethernet. Verify a good connection to the Ethernet with mii-tool, documented in Section B.5, “mii-tool”.
Each host must share IP network space. Practically, this means that each host should have the same network address, netmask, and broadcast address ^[8].
Each host must have a unique IP address.
Neither host must block the other's IP packets. (Host based packet filtering may hinder connections!)

This concludes the tour of basic host networking and IP layer configuration as well as some basic tools available to the linux user. For further documentation on these tools, other tips, tricks, and more advanced content, keep reading!

^[8]Technically, the two hosts simply need to have routes to each other, but we are discussing the simplest case here, so we'll leave this for a discussion of shared media.