子网及子网掩码技术在网络中的应用

The Subnet and Subnet Mask Application in the Network Technology

子网自从诞生以来就是为网络服务，为了使原本已经非常紧张的IP地址资源得到充分的利用；子网掩码则是用来区分网络地址中的网络ID和主机ID，它屏蔽IP地址的一部分，从而从IP地址中分离出网络ID和主机ID。但是要如何才能使IP地址得到充分的利用？这需要将子网划分为2的m次方，经过一些运算得到子网掩码，在子网掩码被设计出来后，子网就被成功的划分了。IP地址就是这样得到更有效的利用的。而在网络中子网及子网掩码还有其特殊的作用，这些作用有很多，他们才是子网及子网掩码在网络中的真正作用!

Since the inception of the subnet is to network services, to make an already very tense IP address resources are fully utilized; subnet mask is used to distinguish the network address of the network ID and host ID,its IP address shield part,which was isolated from the IP address of the network ID and host ID.But how can the IP address can be fully utilized？This requires subnetting of 2 the power m, after some computation by the subnet mask,the mask was designed,the subnet was successfully divided.This IP address is a more efficient use.In the network subnet and subnet mask as well as its special role,these roles are many, they are the subnet and the subnet mask the real role in the network !