![]() ![]() Certain blocks of IPv4 addresses have been reserved exclusively for private use. (LANs may also use IP addressing and IP protocols for communicating within a local area network, although using MAC addresses is sufficient for internal communication.) Before IP addressing is discussed, some of the basic elements of Internet communication such as routers, firewalls and Internet service providers are covered below. This need led to the development of IP addressing and the many IP-based protocols for communicating over the Internet, which is a global system of interconnected computer networks. To send data between a device on one local area network to another device on another LAN, a standard way of communicating is required since local area networks may use different types of technologies.
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