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Cisco Networking Essentials by Troy McMillan

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Describing the Function of IP Addresses

The original version of TCP/IP was written in September 1981. In 1983, the DoD mandated that all of their computer systems would use the TCP/IP protocol suite for long-haul communications. This network eventually evolved into the Internet as we know it today, and TCP/IP is the protocol of the Internet. TCP/IP has become the networking protocol for LANs as well.

The Internet Protocol (IP) part of the TCP/IP suite handles the routing and addressing function at the Internet layer of the TCP/IP model. As you will learn later in this chapter, IP addresses, unlike MAC addresses, are logical and are managed by network technicians. Because IP addressing is designed and implemented by network technicians, it is ...

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