The IANA organization was originally responsible for registering an IP address for an organization, and also handling domain name requests, and so forth.
IANA is now part of ICANN, which oversees these areas and others within the internet.
One no longer has to register directly via IANA (which used to be the only way to get an IP address for your network in the past). You can register via other domain registrars and ISP organizations, which do the work for you.
An "ip address" is a complete source or destination address that has a network id portion and a client or host portion. The network id is just a piece of the IP address. So, a public ip is an IP address that can be routed, whereas the network id is just a part of the public ip. They aren't different; the network id is part of the ip address.
how do you obtain network id from ip address
To reduce congestion & optimize the IP address space.
IP addresses are assigned by a particular authority called IANA. IP address is of two types IP version 4 and version 6. The database where names corresponding to IP address are stored is called name space.
An IP address is the unique identifier assigned to any personal computer connected to the internet.
ID Names are users that have contributed anonymously, by using their IP Address. Supervisors do not see IDs, but see the IP Address of the contributor.
Class A IP address.
The subnet mask is used for this purpose; it divides the IP address into two parts, the network id, and the host id.
Assuming that the IP address is a classfull IP, we know that it is a Class B address because a Class B IP address ranges from 128 - 191. In a class B address the default subnet mask is 255.255.0 (or /16). Therefore the net ID would be 137.56.0.0 and the Host ID would be x.x.8.6. "x" meaning the network ID.
Since this is a class C network address, the host id is 24, the network id is 201.123.87.0
An IP address has 2 levels of hierarchy: network ID and host ID. The network ID identifies the network the host is connected to .The host ID identifies the host on the network.In your computer, in order to know the IP address of the system, use the run prompt in which ipconfig/all command will give the ip address of the system.Answer 2:To find out your external ip which is what is really important if you are doing port forwarding and other tasks use the site: whatismyip.com.
To find the Network ID and Host ID from an IP address you need to use a Subnet Mask. The address 220.43.6.8 is a class C IP address (Since the range of Class C address is 192.0.0.0 to 223.255.255.255).The standard default mask for class C is 255.255.255.0Network address = (IP address) Boolean AND (Subnet mask)Hence,network address = 220.43.6.8 AND 255.255.255.0 = 220.43.6(since 255 means all 1s in binary, hence it'll give the same bits which are ANDed with it, whereas 0 means all 0s in binary, hence it'll give answer as 0 irrespective of what bits are ANDed with it)Hence Host Address would be the remaining part of IP address = 8