CompTIA A+ Certification All-in-One Exam Guide (Exams 220-1001 & 220-1002) by Mike Meyers

Author:Mike Meyers
Language: eng
Format: epub, pdf
Publisher: McGraw-Hill Education
Published: 2019-07-15T00:00:00+00:00

Figure 19-14 Link-local address in ipconfig

The second 64 bits of a link-local address, the interface ID, are generated in two ways. Every current operating system generates a 64-bit random number. Very old operating systems, such as Windows XP and Windows Server 2003, used the device’s MAC address to create a 64-bit number called an Extended Unique Identifier, 64-bit (EUI-64).

The link-local address does all the hard work in IPv6, and, as long as you don’t need an Internet connection, it’s all you need. The old concepts of static and DHCP addressing don’t really make much sense in IPv6 unless you have dedicated servers (even in IPv6, servers generally still have static IP addresses). Link-local addressing takes care of all your local network needs.

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