192.168.anything.anything, 10.anything, and 172.0-172.16.anything are usually private. If it does not begin with 192, 172, or 10, it is definitely public.
The IP Address identifies a PC on a network. Source: I am an IT student in College :)
If a network is using a public IP address, anyone can use it to log on to the network. A private IP address requires a specific password. Only users who have the password can use that connection.
APIPA stands for Automatic Private IP Address Generally it will be in the range 169.254.0.1 up to 169.254.255.254 (subnet of 255.255.0.0) This is the IP address a computer gets when it is set up pick up an IP address automatically and there is no DHCP server... or the computer can't see a router. The computer will be able to connect to any other computer on the network with an IP in the same range, but will NOT be able to connect to the internet.
Not on the same network it can't. If you are using internal private addressing then the address could be duplicated in many other networks. Private addresses and NAT proxy do not reveal the actual IP address (it is translated on the way out of and into a network). In that case the internal IP address may be the same (in different networks).
internet provider Its actually internet protocol. Every computer on the network has to have its own address, this address is called the IP address. Though since you asked what is IP. IP is just a protocol.
192.168.x.x is an IP address in the private IP address range.
IP address is the internet protocol address which is unique for each system in the given network. IP address is like an unique id that uniquely identifies a system on a network. Yes even if you are not connected to internet, computer would still have an IP address.
NAT (Network Address Translation) A service that translates a private IP address to a public IP address in packets destined for the internet, then translates the public IP address in the reply to the private address.
IP address is an logical value which is used to communicate with different computer in network.
IP Address
172.16.0.0 is itself a private IP address. (IP addresses from 172.16.0.0 to 172. 31.255.255 are all private IP addresses. Other private IP addresses are 10.X.X.X and 192.168.X.X where X can be from 0 to 255). But it's not usable as an IP address for a device such as a PC or host. This is because it's the first address and, by convention, the first address of a network is used to indicate its network address.
A computer running Windows (except Windows NT) will use a system named APIPA (Automatic Private Internet Protocol Addressing) to assign itself an IP address. Using APIPA, the computer will assign itself an IP address from the 169.254.0.0 /16 network which is part of the private class B IP range. The valid address range for this network is 169.254.0.1 to 169.254.255.254 The subnet mask for this network is 255.255.0.0 The computers will use ARP (Address Resolution Protocol) to confirm that the IP address that it has chosen is unique and not being used by any other computer on the local network. When the DHCP server becomes available again, the computers will contact it and attempt to lease or renew a new IP address.