Private IP Address

Private IP addresses are commonly used for home, office, and enterprise local area networks (LANs), when globally routable addresses are not mandatory, or are not available for the intended network applications. Under IPv4, the private IP address

spaces were originally defined in an effort to delay IPv4 address exhaustion, but they are also a feature of IPv6, the next generation Internet Protocol.

Source - smartlab.at & wikipedia.org

Public Vs Private

Source - smartlab.at & wikipedia.org

Private IP Address Range and Class

Source - smartlab.at & wikipedia.org

Uses of Private IP Address-• The most common use of private addresses is in residential networks, since most Internet

service providers (ISPs) only allocate a single publicly routable IP address to each residentialcustomer, but many homes have more than one computer or other Internet connecteddevice, such as smartphones. In this situation, a network address translator (NAT/PAT)gateway is usually used to provide Internet connectivity to multiple hosts.

• Private addresses are also commonly used in corporate networks, which for security reasons,are not connected directly to the Internet. Often a proxy, SOCKS gateway, or similar devicesare used to provide restricted Internet access to network-internal users.

• In both cases, private addresses are often seen as enhancing network security for the internalnetwork, since it is difficult for an Internet host to connect directly to an internal system.

Source - smartlab.at & wikipedia.org

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Source - smartlab.at & wikipedia.org