The majority of their machines are purely for internal use. In the DNA scheme, all machines in a network are assigned a permanent internal address and can communicate with any machines within the same network. The external addresses are allocated by the EASS server on request. These machines can only used as clients to call machines in other networks, i.e., they can not be called by machines in other networks. A network can choose any network number other than its external network number as its internal network number.
Different networks can use the same network number as their internal number.
We propose to reserve one Class A network number as the well-known network number for internal use. The Advantages The DNA scheme attempts to tackle the problem from the bottom of the Internet, i.e., each individual network, while other schemes described in the first section deal with the problem from the top of the Internet, i.e., gateways and exterior routing algorithms. These schemes, however, do not need to be consider as mutually exclusive. Different networks can individually choose to adopt the scheme at any time only when necessary. There is no need for global coordination between different networks for their deployment.