Telematics Chapter 6: Network Layer - Freie Universität Berlin
Telematics Chapter 6: Network Layer - Freie Universität Berlin
Telematics Chapter 6: Network Layer - Freie Universität Berlin
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IP Addresses are scarce…<br />
● Problems<br />
● Nobody had thought about the explosive growth of the Internet<br />
(otherwise one would have defined longer addresses from the beginning).<br />
● Too many Class A address blocks were assigned in the first Internet years.<br />
● Inefficient use of the address space.<br />
● Example: if 500 devices in an enterprise are to be attached, a Class B address<br />
block is needed, but by this unnecessarily more than 65,000 host addresses are<br />
blocked.<br />
● Solution approach: Extension of the address space in IPv6<br />
IP version 6 has 128 bits for addresses � 2 128 addresses<br />
7 x 1023 IP addresses per square meter of the earth's surface (including the<br />
oceans!)<br />
one address per molecule on earth's surface!<br />
● But: The success of IPv6 is not by any means safe!<br />
● The introduction of IPv6 is tremendously difficult: Interoperability, costs,<br />
migration strategies, …<br />
Univ.-Prof. Dr.-Ing. Jochen H. Schiller ▪ cst.mi.fu-berlin.de ▪ <strong>Telematics</strong> ▪ <strong>Chapter</strong> 6: <strong>Network</strong> <strong>Layer</strong><br />
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