IPv6 was created mainly because IPv4's roughly 4.3 billion addresses ran out. An IPv6 address is 128 bits, written as eight groups (hextets) of four hexadecimal digits separated by colons, such as 2001:0db8:0000:0000:0000:ff00:0042:8329. That space is so large that NAT is no longer needed to conserve addresses, and every device can have a globally unique address. IPv6 also simplifies the header, removes broadcast and builds in autoconfiguration. Network+ expects you to read and shorten addresses, recognise address types by their prefix, and know how IPv6 coexists with IPv4.
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