The difference between the internal network and the public network
Public network ip server
can be used for DNS ip, remote login server ip, ip address of the server is the most important.
Ip network
can not be used for domain name resolution.
Can not be directly used for remote login server, its main role is: to-machine communication with other similar clusters in the current account .
Some small businesses or schools, are often apply for a fixed IP address, and then shared over IP (IP Sharing), use the entire company or school machines are able to access the Internet.
The IP addresses of these companies or schools use the machine within the network is IP, IP network is in the planning IPv4 protocol, taking into account the IP address resources may not be sufficient, on specially designed private IP address of the internal network (or so-called reserved address ),
Commonly used internal IP addresses are of the form of: 10.XXX, 172.16.xx-172.31.xx, 192.168.XX like.
Note that the computer within the network may send a connection request to the other computers on the Internet, but other computers on the Internet can not send connection requests inwardly computer network .
In addition to retaining public IP is an IP address other than the IP address, you can freely visit each other with other computers on the Internet.
We usually refer to IP addresses, in fact, refers to the public network IP. Each computer on the Internet has a unique IP address, the IP address uniquely identifies a computer on the Internet.
IP address here refers to a public IP address.
In fact, computers on the Internet through the "public network IP + IP" uniquely determined , like many buildings are the same room 201, the room number as possible, but the building is certainly unique.
Public IP address and network IP address is the same, different companies or schools within the machine may have the same IP address, but they are certainly different public IP address.